Advanced

eSIM Not Working? Complete Troubleshooting Guide (2026)

Fix eSIM problems fast: no service, won't install, no internet, slow speeds, hotspot not working. Step-by-step troubleshooting for iPhone and Android with solutions for Airalo, Holafly, and Saily.

eSIM.school Team 2026-03-03
#esim troubleshooting #esim not working #no service #esim problems #data roaming

You have just landed in a new country, your eSIM is installed, but you cannot get online. Your phone shows “No Service,” the internet is not loading, or something just is not right. Do not panic — this is one of the most common travel frustrations, and nearly every eSIM problem has a simple fix.

This guide covers every eSIM issue we have seen, organized from the most common to the least common, with step-by-step solutions for both iPhone and Android.

Quick Fix Checklist (Try These First)

Before diving into detailed troubleshooting, try these five steps. They solve roughly 70% of all eSIM problems:

Step 1: Toggle Airplane Mode On and Off Turn Airplane Mode ON, wait 10 seconds, then turn it OFF. This forces your phone to reconnect to available networks.

Step 2: Check That Data Roaming is ON This is the single most common cause of eSIM failure. Travel eSIMs use partner networks abroad, which your phone considers “roaming.”

  • iPhone: Settings > Cellular > [Your eSIM line] > Data Roaming > ON
  • Android: Settings > Connections > Mobile Networks > Data Roaming > ON

Step 3: Verify Your Default Data Line is Set to the eSIM If you have dual SIM, your phone might still be routing data through your primary SIM.

  • iPhone: Settings > Cellular > Cellular Data > Select your eSIM
  • Android: Settings > Connections > SIM Manager > Mobile Data > Select eSIM

Step 4: Restart Your Phone A full restart (power off, wait 30 seconds, power on) resets the cellular radio and often fixes connection issues that toggling Airplane Mode does not.

Step 5: Check That Your eSIM Plan is Active and Has Data Remaining Log in to your eSIM provider’s app or website. Verify:

  • The plan status shows “Active” (not “Pending” or “Expired”)
  • You still have data remaining in your allowance
  • You are in a country covered by the plan

Did the Quick Fix work? If yes, you are all set. If not, find your specific problem below.

Problem 1: eSIM Will Not Install / QR Code Not Working

Symptoms

  • QR code scan fails or shows an error
  • “Unable to add cellular plan” message
  • Installation gets stuck at “Activating…” or “Downloading…”
  • “This code is no longer valid” error

Causes and Solutions

CauseHow to IdentifySolution
Unstable WiFi connectionDownload starts but fails partway throughSwitch to a stronger WiFi network. Avoid public WiFi with captive portals (hotel login pages). Try using your phone’s existing mobile data instead.
QR code already usedError says “already installed” or “code invalid”Most QR codes are single-use. Check if the eSIM is already in your SIM list (Settings > Cellular). If you need a fresh QR code, contact your provider.
Phone not eSIM compatible”Add eSIM” option does not appear in settingsVerify compatibility: iPhone XS or later (except iPhone SE 2nd gen in some regions), Samsung Galaxy S20 or later, Google Pixel 3a or later. Check our eSIM compatible devices list.
Carrier-locked phoneError says “not supported” or “contact carrier”Your phone may be locked to a specific carrier. Contact your carrier to request an unlock. This can take 1-3 business days.
Outdated operating systemInstallation fails with a vague errorUpdate to the latest iOS or Android version. Some eSIM features require recent OS updates.
Maximum eSIMs reachedError says “cannot add more plans”Delete an unused eSIM profile to make room: Settings > Cellular > [Old eSIM] > Remove Cellular Plan.

Step-by-Step Installation Troubleshooting

QR code won't scan or install fails?
|
+-- Is the QR code clear and fully visible?
|   +-- NO --> Zoom in, increase screen brightness on the display
|   |          showing the QR code. Or try manual activation code.
|   +-- YES --> Continue
|
+-- Are you connected to the internet?
|   +-- NO --> Connect to WiFi or use existing mobile data.
|   +-- YES --> Continue
|
+-- Have you used this QR code before?
|   +-- YES --> Check SIM list for existing profile.
|   |           Request new QR code from provider if needed.
|   +-- NO --> Continue
|
+-- Try manual activation code method:
|   Find SM-DP+ address and activation code in your email.
|   Enter manually in Settings > Cellular > Add eSIM > Enter Manually.
|
+-- Still failing?
|   +-- Restart phone and retry.
|   +-- Try on a different WiFi network.
|   +-- Check for iOS/Android updates and install them.
|   +-- Contact provider support with your order ID and error screenshot.

Problem 2: eSIM Installed But Shows “No Service”

This is the most frustrating scenario: the eSIM installed successfully, but your phone displays “No Service” or “Searching…” where the carrier name should be.

Causes and Solutions

Cause 1: Data Roaming is OFF (Most Common)

This accounts for about 50% of all “No Service” reports. Your travel eSIM needs data roaming enabled to connect to partner networks.

Fix:

  • iPhone: Settings > Cellular > Tap your eSIM line > Toggle Data Roaming ON
  • Samsung: Settings > Connections > Mobile Networks > Data Roaming ON
  • Pixel: Settings > Network & internet > SIMs > [eSIM] > Toggle Roaming ON

Important: Turning on Data Roaming for your travel eSIM does NOT incur extra charges. The roaming data is included in your eSIM plan. Only turn it on for the travel eSIM line, not your home SIM.

Cause 2: Not in the Coverage Area

Your eSIM only works in the countries listed in your plan. If you installed the eSIM before traveling, it will show “No Service” until you physically arrive in the covered region.

Fix: Wait until you arrive at your destination. The eSIM should automatically connect once you are within coverage. After landing, toggle Airplane Mode on/off to force a network search.

Cause 3: Default Data Line Set to Wrong SIM

Your phone may be sending data through your primary SIM instead of the eSIM.

Fix:

  • iPhone: Settings > Cellular > Cellular Data > Select your eSIM line
  • Samsung: Settings > Connections > SIM Manager > Mobile Data > eSIM
  • Pixel: Settings > Network & internet > SIMs > Select eSIM > Enable as data SIM

Cause 4: Network Selection Set to Manual

If your phone is set to manually select a network, it might be trying to connect to an incompatible carrier.

Fix:

  • iPhone: Settings > Cellular > [eSIM line] > Network Selection > Toggle Automatic ON
  • Samsung: Settings > Connections > Mobile Networks > Network Operators > Select automatically
  • Pixel: Settings > Network & internet > SIMs > [eSIM] > Automatically select network ON

Cause 5: APN Configuration Missing or Incorrect

Some eSIM providers require specific APN (Access Point Name) settings. Without correct APN, your phone cannot route data properly.

Fix: Check your eSIM provider’s email or app for APN instructions. To enter APN manually:

  • iPhone: Settings > Cellular > [eSIM line] > Cellular Data Network > Enter APN details
  • Samsung: Settings > Connections > Mobile Networks > Access Point Names > Add new APN
  • Pixel: Settings > Network & internet > SIMs > [eSIM] > Access Point Names > Add

Common APN values by provider:

ProviderAPNOther Settings
Airaloglobaldata (varies by plan)Leave other fields blank
HolaflyinternetLeave other fields blank
SailysailyLeave other fields blank

Tip: If you do not know the correct APN, contact your provider’s support. Wrong APN values can prevent data from working even when you have signal.

Problem 3: eSIM Has Signal But No Internet

Your phone shows a carrier name and signal bars, but web pages will not load, apps will not connect, and nothing works over data.

Causes and Solutions

Cause 1: APN Settings Are Wrong

This is the most common cause of “signal but no data.” The APN tells your phone how to connect to the carrier’s data network.

Fix:

  1. Contact your eSIM provider for the correct APN.
  2. Go to Settings > Cellular > [eSIM line] > Cellular Data Network.
  3. Enter the APN exactly as provided (case-sensitive).
  4. Restart your phone after changing APN.

Cause 2: Data Allowance Exhausted

You may have used up all the data in your plan without realizing it.

Fix:

  1. Open your eSIM provider’s app or website.
  2. Check remaining data balance.
  3. If depleted, purchase an add-on or a new eSIM plan.

Cause 3: You Are Being Rate-Limited (Fair Use Policy)

Some “unlimited” plans have a Fair Use Policy (FUP). After hitting a daily threshold (typically 1-5 GB/day), speeds drop dramatically — sometimes to the point where pages will not load at all.

Fix:

  1. Wait until the next day when the throttle resets (usually midnight local time).
  2. Connect to WiFi for heavy usage.
  3. For future trips, consider providers with genuinely higher FUP thresholds.

Cause 4: VPN or Proxy Interference

An active VPN can conflict with eSIM data routing, especially if it is configured for your home network.

Fix:

  1. Disable any VPN apps.
  2. Check Settings > General > VPN & Device Management (iPhone) or Settings > Connections > More Connection Settings > VPN (Samsung) and disconnect.
  3. Test internet without VPN first. If it works, reconfigure VPN for the new network.

Cause 5: DNS Resolution Issues

Rarely, the default DNS servers assigned by the carrier may be slow or broken.

Fix: Switch to a public DNS:

  • iPhone: Settings > WiFi (for WiFi) or use a DNS configuration app for cellular
  • Try 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google)

Problem 4: eSIM Speed is Very Slow

Your eSIM connects and works, but everything loads at a crawl. Videos buffer endlessly, and even text-based websites take forever.

Causes and Solutions

Cause 1: Fair Use Policy (FUP) Throttling

Many “unlimited” eSIM plans throttle speeds after you exceed a daily data cap:

ProviderDaily FUP ThresholdThrottled Speed
Holafly3-5 GB/day (varies by country)~1 Mbps
AiraloNo FUP on most plans (data-capped plans)N/A (plan expires when data used)
SailyVaries by planVaries

Fix: Check if you have hit the daily cap. Wait until midnight local time for the throttle to reset. Consider buying a plan with a higher data cap or genuine unlimited data.

Cause 2: Connected to a 3G Network Instead of 4G/5G

Your phone may have fallen back to a slower network.

Fix:

  • iPhone: Settings > Cellular > [eSIM line] > Voice & Data > Select LTE or 5G Auto
  • Samsung: Settings > Connections > Mobile Networks > Network Mode > Select LTE/5G
  • Pixel: Settings > Network & internet > SIMs > [eSIM] > Preferred network type > 5G/LTE

Cause 3: Network Congestion

In densely populated areas (airports, tourist hotspots, concerts), networks become congested. eSIM users on MVNO plans may be deprioritized compared to direct carrier subscribers.

Fix:

  1. Move to a less congested area if possible.
  2. Wait and try again — congestion is often temporary.
  3. Switch between mobile data and WiFi to find the best connection.

Cause 4: Low Signal Strength

If you are in a rural area or inside a thick-walled building, signal strength drops, reducing speeds.

Fix:

  1. Move to a window or go outdoors.
  2. Check your signal bars — 1-2 bars means weak signal.
  3. Toggle Airplane Mode on/off to force reconnection to a stronger tower.

Cause 5: Background Apps Consuming Bandwidth

Cloud backups, automatic app updates, and streaming services running in the background consume data and bandwidth.

Fix:

  • iPhone: Settings > General > Background App Refresh > Turn off for non-essential apps
  • Samsung: Settings > Apps > [App] > Mobile Data > Restrict background data
  • Also disable: iCloud/Google Photos auto-backup, automatic app updates, cloud sync

Problem 5: eSIM Hotspot / Tethering Not Working

You want to share your eSIM data with a laptop, tablet, or travel companion’s phone, but the Personal Hotspot feature does not work.

Causes and Solutions

Cause 1: Provider Does Not Allow Tethering

Some eSIM providers explicitly disable hotspot/tethering in their plans. This is a business decision, not a technical limitation.

ProviderHotspot Allowed?Notes
AiraloYes (most plans)Tethering included by default
HolaflyNo (most plans)Explicitly blocked on many plans
SailyYesIncluded with data plans
NomadYesIncluded by default
GigskyYesMost plans support it

Fix: If your provider blocks tethering, there is no technical workaround. You would need to purchase a plan from a provider that explicitly supports hotspot usage.

Cause 2: APN Missing “dun” Type

On some Android devices, tethering requires the APN type to include “dun” (Dial-Up Networking).

Fix:

  1. Go to Settings > Connections > Mobile Networks > Access Point Names.
  2. Tap your eSIM’s APN.
  3. Find the “APN type” field.
  4. Add “dun” to the existing value (e.g., change “default,supl” to “default,supl,dun”).
  5. Save and restart your phone.

Cause 3: Personal Hotspot Option Not Appearing (iPhone)

On iPhone, the Personal Hotspot option may disappear when using certain eSIM profiles.

Fix:

  1. Go to Settings > Cellular > [eSIM line] > Cellular Data Network.
  2. Scroll down to Personal Hotspot section.
  3. Enter the same APN value as your cellular data APN.
  4. Restart your phone.
  5. Personal Hotspot should now appear under Settings.

Problem 6: eSIM Disappeared After Phone Update

After updating your iPhone’s iOS or your Android phone’s system software, your eSIM profile seems to have vanished.

Causes and Solutions

Cause 1: eSIM Profile Was Accidentally Removed During Update

Major OS updates (e.g., iOS 17 to iOS 18) can occasionally reset cellular configurations.

Fix:

  1. First, check if the eSIM is still present but disabled: Settings > Cellular (iPhone) or Settings > Connections > SIM Manager (Samsung).
  2. If the eSIM line is listed but turned off, simply toggle it back on.
  3. If the eSIM is completely gone, contact your provider for a replacement QR code or re-download link.

Cause 2: Factory Reset Removed the eSIM

A factory reset erases everything, including eSIM profiles.

Fix:

  1. Contact your eSIM provider with your order confirmation.
  2. Request a new QR code or activation code.
  3. Most providers will reissue for free if the plan has remaining data/time.

Cause 3: eSIM Transfer During Device Setup (iPhone)

When setting up a new iPhone from backup, the eSIM may not transfer automatically if eSIM Quick Transfer was not used.

Fix:

  1. On your new iPhone: Settings > Cellular > Add eSIM.
  2. If eSIM Quick Transfer is available, select Transfer from Nearby iPhone.
  3. If not available, contact your provider for a new QR code.

Prevention Tip: Before any OS update or device switch, take a screenshot of your eSIM details (plan name, provider, remaining data). This makes it much easier to recover or get a replacement.

Brand-Specific Troubleshooting

Different eSIM providers have different quirks. Here is how to get help from the major brands:

Airalo

  • Common Issue: eSIM shows “Not Supported” after installation
  • Fix: Ensure you selected the correct regional plan. Some country-specific plans only work in that exact country.
  • Support: 24/7 live chat in the Airalo app, email support@airalo.com
  • Response Time: Usually within 5-15 minutes via live chat

Holafly

  • Common Issue: “Unlimited” plan slows down significantly after 3-5 GB daily usage
  • Fix: This is Fair Use Policy, not a malfunction. Speed resets at midnight local time.
  • Common Issue: Hotspot not working
  • Fix: Most Holafly plans do not support tethering. This is stated in the plan terms.
  • Support: 24/7 live chat at holafly.com, WhatsApp support available
  • Response Time: Usually within 10-20 minutes

Saily

  • Common Issue: Installation takes longer than expected
  • Fix: Ensure you have a strong WiFi connection. Saily profiles can take up to 2 minutes to download.
  • Support: In-app support, email help@saily.com
  • Response Time: Usually within 1-2 hours via email, faster via in-app

General Support Tips

When contacting any provider’s support:

  1. Have your order number ready.
  2. Include your device model and OS version.
  3. Describe the exact error message (screenshot if possible).
  4. Mention what troubleshooting steps you have already tried.

When to Contact Support vs. When to Buy a New eSIM

Sometimes it is faster to just buy a new eSIM than to wait for support to fix a broken one. Here is a decision framework:

SituationRecommendation
Plan has 5+ days remaining, data issueContact support — worth the wait
Plan expires in 1-2 days, cannot connectBuy a new eSIM from a different provider
QR code used but eSIM never installedContact support — they can reissue
Speed is slow but usableLive with it or supplement with WiFi
Hotspot does not work (provider blocks it)Buy from a tethering-friendly provider
eSIM disappeared after updateContact support for free replacement
Provider support is unresponsive (24+ hours)Buy a new eSIM, request refund later

Pro Tip: For important trips, always have a backup plan. Download eSIMs from two different providers before you travel. Install the backup eSIM only if the primary one fails. Most eSIMs that activate on first network connection will not start counting until you actually use them.

Frequently Asked Questions

1. Why does my eSIM work in some apps but not others?

Some apps may be configured to use a specific network interface (WiFi only, or your primary SIM). Additionally, some countries block certain apps or services at the network level.

Fix: Check app-specific network settings. Try toggling between WiFi and cellular. If a specific app is blocked in that country, consider using a VPN.

2. Can I reset my eSIM without losing the plan?

Deleting and reinstalling an eSIM from your phone does NOT usually cancel the plan on the provider’s side. However, you will need a new QR code to reinstall.

Steps:

  1. Remove the eSIM: Settings > Cellular > [eSIM line] > Remove eSIM
  2. Contact your provider for a new QR code
  3. Reinstall using the new QR code

Some providers (like Airalo) allow re-downloading from their app without contacting support.

3. My eSIM shows “LTE” but speeds feel like 3G. What is happening?

Several possibilities:

  • Fair Use Policy throttling after daily cap
  • Network congestion in your area
  • Your phone is on LTE Band 20 or another low-speed band
  • The provider’s MVNO agreement limits throughput

Run a speed test (speedtest.net or the Speedtest app) to measure actual speeds. If speeds are consistently below 1 Mbps, contact your provider.

4. Does removing an eSIM delete my plan?

Removing an eSIM from your phone deletes the local profile only. Your plan data and remaining balance typically remain on the provider’s server. However, reinstalling requires a new QR code from the provider. Do not remove your eSIM unless you are sure you will not need it again or have confirmed with the provider that you can get a replacement code.

5. Why does my eSIM keep disconnecting?

Intermittent disconnections can be caused by:

  • Weak signal areas (phone constantly searching for better towers)
  • Battery saver mode restricting cellular radio
  • Conflicting SIM settings (both SIMs trying to use data)
  • Faulty eSIM profile

Fix: Disable battery saver, ensure only one SIM is set for data, toggle Airplane Mode, and if the problem persists, reinstall the eSIM profile.

6. I bought a regional eSIM but it does not work in one of the listed countries. What should I do?

Regional eSIM plans (e.g., “Europe” or “Asia”) partner with different carriers in each country. Occasionally, the partner carrier in a specific country may have coverage gaps or technical issues.

Fix:

  1. Toggle Airplane Mode on/off to force a network search.
  2. Manually select a different carrier: Settings > Cellular > [eSIM] > Network Selection > Turn off Automatic > Choose a different available network.
  3. If no networks appear, you may be in an area with genuinely no coverage from partner carriers.
  4. Contact the provider to confirm which carriers your plan uses in that specific country.

eSIM连不上网？完整故障排除指南

你刚降落一个新国家，eSIM也装好了，但就是连不上网。手机显示”无服务”，网页打不开，或者什么地方就是不对劲。别慌——这是最常见的旅行困扰之一，几乎每个eSIM问题都有简单的解决办法。

本指南涵盖了我们见过的所有eSIM问题，从最常见到最少见依次排列，为iPhone和安卓提供逐步解决方案。

快速修复清单（先试这5步）

在深入排查之前，先试试这五步。它们能解决大约70%的eSIM问题：

第1步：开关飞行模式 打开飞行模式，等10秒，再关闭。这会强制手机重新搜索可用网络。

第2步：检查数据漫游是否开启 这是eSIM不能用的头号原因。旅行eSIM使用目的地的合作运营商网络，你的手机会将此视为”漫游”。

  • iPhone：设置 > 蜂窝网络 > [你的eSIM线路] > 数据漫游 > 开启
  • 安卓：设置 > 连接 > 移动网络 > 数据漫游 > 开启

第3步：确认默认数据线路设为eSIM 如果你是双卡手机，数据可能还在走你的主SIM卡。

  • iPhone：设置 > 蜂窝网络 > 蜂窝数据 > 选择你的eSIM
  • 安卓：设置 > 连接 > SIM卡管理器 > 移动数据 > 选择eSIM

第4步：重启手机 完全关机（关机，等30秒，再开机）会重置蜂窝无线电模块，通常能修复开关飞行模式解决不了的连接问题。

第5步：检查eSIM套餐是否激活且有剩余流量 登录你的eSIM供应商APP或网站，确认：

  • 套餐状态显示”激活”（不是”待处理”或”已过期”）
  • 还有剩余流量
  • 你在套餐覆盖的国家

快速修复有效吗？ 如果有效，你已经搞定了。如果没有，在下面找到你的具体问题。

问题一：eSIM安装失败/QR码不能用

症状表现

  • QR码扫描失败或显示错误
  • “无法添加蜂窝号码方案”提示
  • 安装卡在”正在激活…”或”正在下载…”
  • “此代码不再有效”错误

原因与解决方案

原因如何判断解决方法
WiFi连接不稳定下载开始但中途失败切换到更强的WiFi网络。避免有登录页面的公共WiFi（酒店WiFi）。试试用手机现有的移动数据。
QR码已被使用错误提示”已安装”或”代码无效”大多数QR码是一次性的。检查SIM卡列表中是否已有该eSIM（设置 > 蜂窝网络）。如需新QR码，联系供应商。
手机不兼容设置中没有”添加eSIM”选项确认兼容性：iPhone XS及以后（部分地区SE二代除外）、三星Galaxy S20及以后、Google Pixel 3a及以后。查看我们的eSIM兼容设备列表。
运营商锁定错误提示”不支持”或”联系运营商”手机可能被锁定在特定运营商。联系运营商申请解锁，通常需要1-3个工作日。
系统版本过旧安装失败并显示模糊错误更新到最新的iOS或安卓版本。部分eSIM功能需要较新的系统版本。
eSIM数量已满错误提示”无法添加更多方案”删除一个不用的eSIM配置文件腾出空间：设置 > 蜂窝网络 > [旧eSIM] > 移除蜂窝号码方案。

安装失败逐步排查流程

QR码扫不了或安装失败？
|
+-- QR码清晰可见吗？
|   +-- 不清晰 --> 放大图片，调高显示QR码那个屏幕的亮度。
|   |              或者尝试手动输入激活码。
|   +-- 清晰 --> 继续
|
+-- 手机已联网吗？
|   +-- 没有 --> 连接WiFi或使用现有移动数据。
|   +-- 已联网 --> 继续
|
+-- 这个QR码用过了吗？
|   +-- 用过 --> 检查SIM卡列表中是否已有该配置文件。
|   |           需要的话向供应商申请新QR码。
|   +-- 没用过 --> 继续
|
+-- 尝试手动输入激活码：
|   在邮件中找到SM-DP+地址和激活码。
|   在 设置 > 蜂窝网络 > 添加eSIM > 手动输入 中输入。
|
+-- 还是不行？
    +-- 重启手机后重试。
    +-- 换一个WiFi网络试试。
    +-- 检查是否有系统更新并安装。
    +-- 联系供应商客服，提供订单号和错误截图。

问题二：eSIM已安装但显示”无服务”

这是最令人沮丧的情况：eSIM安装成功了，但手机在本应显示运营商名称的地方显示”无服务”或”搜索中…”。

原因与解决方案

原因1：数据漫游未开启（最常见）

大约50%的”无服务”反馈都是这个原因。你的旅行eSIM需要开启数据漫游才能连接到合作网络。

解决方法：

  • iPhone：设置 > 蜂窝网络 > 点击eSIM线路 > 数据漫游 开启
  • 三星：设置 > 连接 > 移动网络 > 数据漫游 开启
  • Pixel：设置 > 网络和互联网 > SIM卡 > [eSIM] > 漫游 开启

重要提示： 为旅行eSIM开启数据漫游不会产生额外费用。漫游数据已包含在eSIM套餐价格中。只需为旅行eSIM线路开启，不要为你的主卡开启。

原因2：不在覆盖区域

你的eSIM只在套餐列出的国家工作。如果你在旅行前安装了eSIM，到达覆盖区域之前会一直显示”无服务”。

解决方法：等到达目的地后。eSIM在进入覆盖范围后会自动连接。落地后，开关飞行模式强制搜索网络。

原因3：默认数据线路设错了

手机可能还在通过主SIM卡传输数据，而不是通过eSIM。

解决方法：

  • iPhone：设置 > 蜂窝网络 > 蜂窝数据 > 选择eSIM线路
  • 三星：设置 > 连接 > SIM卡管理器 > 移动数据 > 选eSIM
  • Pixel：设置 > 网络和互联网 > SIM卡 > 选择eSIM > 启用为数据SIM卡

原因4：网络选择设为手动

如果手机被设为手动选择网络，可能正在尝试连接一个不兼容的运营商。

解决方法：

  • iPhone：设置 > 蜂窝网络 > [eSIM线路] > 网络选择 > 自动 开启
  • 三星：设置 > 连接 > 移动网络 > 网络运营商 > 自动选择
  • Pixel：设置 > 网络和互联网 > SIM卡 > [eSIM] > 自动选择网络 开启

原因5：APN配置缺失或错误

部分eSIM供应商需要特定的APN（接入点名称）设置。没有正确的APN，手机无法正确传输数据。

解决方法：查看eSIM供应商邮件或APP中的APN说明。手动输入APN：

  • iPhone：设置 > 蜂窝网络 > [eSIM线路] > 蜂窝数据网络 > 输入APN信息
  • 三星：设置 > 连接 > 移动网络 > 接入点名称 > 新建APN
  • Pixel：设置 > 网络和互联网 > SIM卡 > [eSIM] > 接入点名称 > 添加

各供应商常见APN值：

供应商APN其他设置
Airaloglobaldata（因套餐而异）其他字段留空
Holaflyinternet其他字段留空
Sailysaily其他字段留空

提示： 如果不确定正确的APN，联系供应商客服。错误的APN值即使有信号也会导致无法上网。

问题三：eSIM有信号但不能上网

手机显示运营商名称和信号格，但网页打不开、APP连不上、数据完全不通。

原因与解决方案

原因1：APN设置错误

这是”有信号但没数据”最常见的原因。APN告诉手机如何连接运营商的数据网络。

解决方法：

  1. 联系eSIM供应商获取正确的APN。
  2. 前往 设置 > 蜂窝网络 > [eSIM线路] > 蜂窝数据网络。
  3. 按提供的信息准确输入APN（区分大小写）。
  4. 更改APN后重启手机。

原因2：流量用完了

你可能在不知不觉中用光了套餐里的所有流量。

解决方法：

  1. 打开eSIM供应商的APP或网站。
  2. 查看剩余流量。
  3. 如果已用完，购买附加流量包或新的eSIM套餐。

原因3：被限速了（公平使用政策）

部分”无限流量”套餐有公平使用政策（FUP）。达到每日阈值（通常1-5GB/天）后，速度会急剧下降，有时慢到网页都打不开。

解决方法：

  1. 等到第二天，限速通常在当地午夜重置。
  2. 大流量操作改用WiFi。
  3. 下次旅行考虑FUP阈值更高的供应商。

原因4：VPN或代理干扰

开启的VPN可能与eSIM数据路由冲突，特别是配置为家庭网络的VPN。

解决方法：

  1. 关闭所有VPN应用。
  2. 检查 设置 > 通用 > VPN与设备管理（iPhone）并断开连接。
  3. 先在无VPN状态下测试网络。如果能上网，再重新配置VPN。

问题四：eSIM网速非常慢

eSIM能连接也能用，但一切加载都像蜗牛爬。视频无限缓冲，连纯文字网页都半天打不开。

原因与解决方案

原因1：公平使用政策（FUP）限速

很多”无限流量”eSIM套餐在超过每日流量上限后会限速：

供应商每日FUP阈值限速后速度
Holafly3-5 GB/天（因国家而异）约1 Mbps
Airalo大多数套餐无FUP（按流量计费）不适用（流量用完即过期）
Saily因套餐而异因套餐而异

解决方法：检查是否达到每日上限。等到当地午夜限速重置。考虑购买更高流量上限或真正无限流量的套餐。

原因2：连接到了3G而非4G/5G网络

手机可能回落到了较慢的网络。

解决方法：

  • iPhone：设置 > 蜂窝网络 > [eSIM线路] > 语音与数据 > 选择 LTE 或 5G自动
  • 三星：设置 > 连接 > 移动网络 > 网络模式 > 选择 LTE/5G
  • Pixel：设置 > 网络和互联网 > SIM卡 > [eSIM] > 首选网络类型 > 5G/LTE

原因3：网络拥堵

在人口密集的地方（机场、旅游景点、音乐会），网络会变得拥堵。使用MVNO套餐的eSIM用户可能比运营商直接用户优先级低。

解决方法：

  1. 如果可以，移到人少的地方。
  2. 等一等再试——拥堵通常是暂时的。
  3. 在移动数据和WiFi之间切换，找到最好的连接。

原因4：后台应用消耗带宽

云备份、自动APP更新、后台运行的流媒体服务会消耗数据和带宽。

解决方法：

  • iPhone：设置 > 通用 > 后台APP刷新 > 关闭非必要APP
  • 三星：设置 > 应用程序 > [APP] > 移动数据 > 限制后台数据
  • 同时关闭：iCloud/Google相册自动备份、自动APP更新、云同步

问题五：eSIM热点/共享不能用

你想把eSIM的数据分享给笔记本电脑、平板或同伴的手机，但个人热点功能不工作。

原因与解决方案

原因1：供应商不允许共享

部分eSIM供应商在套餐中明确禁用了热点/共享功能。这是商业决策，不是技术限制。

供应商支持热点？备注
Airalo支持（大多数套餐）默认包含共享功能
Holafly不支持（大多数套餐）多数套餐明确禁止
Saily支持数据套餐包含
Nomad支持默认包含

解决方法：如果供应商禁止共享，没有技术手段可以绕过。你需要购买明确支持热点使用的供应商套餐。

原因2：APN缺少”dun”类型

在某些安卓设备上，共享需要APN类型包含”dun”（拨号网络）。

解决方法：

  1. 前往 设置 > 连接 > 移动网络 > 接入点名称。
  2. 点击eSIM的APN。
  3. 找到”APN类型”字段。
  4. 在现有值后添加”dun”（例如将”default,supl”改为”default,supl,dun”）。
  5. 保存并重启手机。

原因3：个人热点选项消失了（iPhone）

在iPhone上，使用某些eSIM配置文件时，个人热点选项可能消失。

解决方法：

  1. 前往 设置 > 蜂窝网络 > [eSIM线路] > 蜂窝数据网络。
  2. 向下滑动到 个人热点 部分。
  3. 输入与蜂窝数据相同的APN值。
  4. 重启手机。
  5. 个人热点应该会重新出现在设置中。

问题六：手机更新后eSIM消失了

更新iPhone的iOS或安卓手机的系统后，eSIM配置文件似乎不见了。

原因与解决方案

原因1：更新过程中eSIM配置被意外移除

重大系统更新（如iOS 17到iOS 18）偶尔会重置蜂窝配置。

解决方法：

  1. 首先检查eSIM是否仍在但被禁用了：设置 > 蜂窝网络（iPhone）或 设置 > 连接 > SIM卡管理器（三星）。
  2. 如果eSIM线路在列表中但被关闭了，直接打开即可。
  3. 如果eSIM完全消失，联系供应商申请替代QR码或重新下载链接。

原因2：恢复出厂设置删除了eSIM

恢复出厂设置会清除所有数据，包括eSIM配置文件。

解决方法：

  1. 带着订单确认信息联系eSIM供应商。
  2. 申请新的QR码或激活码。
  3. 如果套餐还有剩余流量/时间，大多数供应商会免费重新发放。

预防提示： 在任何系统更新或换机之前，截图保存你的eSIM详情（套餐名称、供应商、剩余流量）。这样恢复或申请替换时会容易得多。

各品牌专项排查

不同eSIM供应商有不同的特点。以下是各大品牌的常见问题和客服联系方式：

Airalo

  • 常见问题： 安装后eSIM显示”不支持”
  • 解决： 确认选择了正确的区域套餐。某些单国套餐只在该国家使用。
  • 客服： Airalo APP内24/7在线客服，邮箱 support@airalo.com
  • 响应时间： 在线客服通常5-15分钟

Holafly

  • 常见问题： “无限流量”套餐在每天用3-5GB后明显变慢
  • 解决： 这是公平使用政策，不是故障。速度在当地午夜重置。
  • 常见问题： 热点不能用
  • 解决： 大多数Holafly套餐不支持共享。这在套餐条款中有说明。
  • 客服： holafly.com 24/7在线客服，支持WhatsApp
  • 响应时间： 通常10-20分钟

Saily

  • 常见问题： 安装时间比预期长
  • 解决： 确保WiFi连接强劲。Saily配置文件下载可能需要最多2分钟。
  • 客服： APP内客服，邮箱 help@saily.com
  • 响应时间： 邮件通常1-2小时，APP内更快

联系客服的通用建议

联系任何供应商客服时：

  1. 准备好你的订单号。
  2. 提供设备型号和系统版本。
  3. 描述具体的错误提示（最好有截图）。
  4. 说明你已经尝试过哪些排查步骤。

什么时候联系客服 vs 什么时候直接买新的

有时候直接买个新eSIM比等客服修好旧的更快。以下是决策参考：

情况建议
套餐还有5天以上，数据有问题联系客服——值得等
套餐1-2天就到期，连不上直接从另一家供应商买新eSIM
QR码用了但eSIM从未安装成功联系客服——他们可以重新发放
网速慢但勉强能用忍一忍，或搭配WiFi使用
热点不能用（供应商不支持）从支持热点的供应商购买
更新后eSIM消失了联系客服免费获取替代码
供应商客服超过24小时不回先买新eSIM，之后再申请退款

专业建议： 重要旅行前，提前准备备用方案。出发前从两家不同供应商下载eSIM。只在主力eSIM出问题时再安装备用的。大多数”首次连接激活”的eSIM在你实际使用前不会开始计时。

常见问题解答

1. 为什么我的eSIM在某些APP上能用，其他的不行？

某些APP可能被配置为只使用特定网络接口（仅WiFi或主SIM卡）。此外，某些国家会在网络层面封锁特定APP或服务。

解决方法：检查APP的网络设置。在WiFi和蜂窝数据之间切换试试。如果某个APP在该国被封锁，考虑使用VPN。

2. 重置eSIM会丢失套餐吗？

从手机删除并重新安装eSIM通常不会取消供应商那边的套餐。但你需要新的QR码来重新安装。

步骤：

  1. 移除eSIM：设置 > 蜂窝网络 > [eSIM线路] > 移除eSIM
  2. 联系供应商获取新QR码
  3. 用新QR码重新安装

部分供应商（如Airalo）允许直接从APP重新下载，无需联系客服。

3. eSIM显示”LTE”但速度感觉像3G怎么回事？

几种可能：

  • 公平使用政策在每日上限后限速
  • 你所在区域网络拥堵
  • 手机连接的是低速LTE频段
  • 供应商的MVNO协议限制了吞吐量

使用测速工具（speedtest.net或Speedtest APP）测量实际速度。如果持续低于1 Mbps，联系供应商。

4. 删除eSIM会取消套餐吗？

从手机删除eSIM只删除本地配置文件。你的套餐数据和剩余余额通常保留在供应商服务器上。但重新安装需要从供应商获取新QR码。除非确定不再需要或已确认供应商可以提供替代码，否则不要随便删除eSIM。

5. 为什么我的eSIM总是断断续续？

间歇性断开可能由以下原因导致：

  • 信号弱的区域（手机不断搜索更好的基站）
  • 省电模式限制了蜂窝无线电
  • SIM设置冲突（两张SIM卡都试图使用数据）
  • eSIM配置文件有问题

解决方法：关闭省电模式，确保只有一张SIM卡设为数据卡，开关飞行模式。如果问题持续，重新安装eSIM配置文件。

6. 我买了区域eSIM但在其中一个国家不能用怎么办？

区域eSIM套餐（如”欧洲”或”亚洲”）在每个国家与不同的运营商合作。偶尔，某个国家的合作运营商可能存在覆盖空白或技术问题。

解决方法：

  1. 开关飞行模式强制搜索网络。
  2. 手动选择其他运营商：设置 > 蜂窝网络 > [eSIM] > 网络选择 > 关闭自动 > 从可用网络中选择另一个。
  3. 如果没有网络出现，你可能在合作运营商确实没有覆盖的区域。
  4. 联系供应商确认你的套餐在该国家使用哪些运营商。
Learn