As iPhones fully embrace eSIM technology, more and more users are choosing eSIMs that require no physical SIM card and can be used instantly after purchase for international travel, business trips, or managing multiple numbers.
If this is your first time using an eSIM on an iPhone and you’re not yet familiar with installing, activating, or deleting one, this guide will walk you through everything from zero to one—clearly and safely.

What You Need Before Installing an eSIM

Before getting started, please make sure the following conditions are met:

✅ Your iPhone supports eSIM
Go to Settings → General → About. If you see “Add eSIM” or “Add Cellular Plan”, your device is compatible.
✅ Your iPhone is connected to the internet
Either Wi-Fi or your existing physical SIM’s cellular network is fine.
✅ iOS 16 or later is recommended
✅ You have already purchased an eSIM
You will usually receive a QR code from the provider.
⚠️ Do NOT activate it yet
Installation can be done in advance. Activation is recommended only when you’re about to use it or have arrived at your destination
⚠️ Important: Most eSIMs are one-time activation products
Do not scan the QR code on a non-target device or activate it too early.

How to Install an eSIM on iPhone

This is the most reliable and standard installation method.
On your iPhone:

1. Open Settings
2. Tap Cellular (or Mobile Data)
3. Select Add eSIM
4. Tap Use QR Code
5. Scan the eSIM QR code provided by your seller
6. Follow the on-screen instructions to complete installation

📌 If you’re unable to scan the QR code, you can choose to enter the details manually.

1. Go to Settings → Cellular.
2. Tap Add eSIM → Use QR Code, then select Enter Details Manually.
3. Enter the SM-DP+ address and Activation Code (these details will be provided via email).

How to Properly Activate an eSIM on iPhone

Please activate your eSIM only when you’re about to use it or after arriving at your destination:

1. Open Settings → Cellula(or Mobile Data)
2. Turn on the newly installed eSIM
3. Enable Data Roaming (if available)
4. Tap Cellular Data and select this eSIM as your primary data line (The original SIM card can still be used to make calls)

Wait 1–5 minutes for the network to connect,Once signal bars appear, activation is successful(You may keep your physical SIM for calls if needed)

Common Activation Issues Troubleshooting

Case 1: eSIM is installed but shows no signal

Please check the following, in order:

• Is the eSIM turned on?
• Is it selected as Cellular Data?
• Is Data Roaming enabled?
• Are you in a supported country or region?

Case 2: “Already activated” or “Unable to use” appears immediately

Common reasons include:

• The eSIM was activated in the wrong country
• Unstable network during activation
• The QR code was scanned multiple times

👉 Do not repeatedly delete and reinstall the eSIM,Instead, contact your eSIM provider to confirm the eSIM status.

What to Do After You Finish Using an eSIM

After your trip or usage is complete, it’s strongly recommended to delete the eSIM:
Go to Settings → Cellular → Select the eSIM you used → Tap Delete eSIM

Why delete it?

• Prevent accidental connection to expired plans
• Avoid conflicts with your next eSIM
• Keep your cellular list clean and organized

Best Practices for Installing Activating eSIM on iPhone

✅ Install before departure, activate after arrival
✅ Screenshot and save your QR code
✅ Be patient on first connection (wait 2–5 minutes)
❌ Do not repeatedly delete and reinstall
❌ Do not activate in the wrong country

Summary

Using an eSIM on your iPhone is one of the most convenient and flexible ways to stay connected internationally today. In just a few minutes, you can complete installation and activation—no physical SIM card and no waiting in line to buy one.

If you encounter any issues during use, feel free to contact Vaymo Customer Support at any time.

With the widespread adoption of eSIM technology, more and more Android smartphones now support connecting to mobile networks without a physical SIM card, simply by scanning a QR code. Whether you are traveling abroad, on a business trip, or looking for a backup data plan, eSIM is currently one of the most convenient connectivity solutions available. This guide will walk you through everything you need to know, from installation to activation and troubleshooting.

Things You Must Confirm Before Installing an eSIM on an Android Phone

✅ Your phone supports eSIM
✅ Your phone is not carrier-locked
✅ Android system version is Android 11 or later
✅ You are connected to a stable Wi-Fi network
⚠️ Do not install an eSIM on an airplane, in the subway, or in an environment with unstable network connectivity
⚠️ Some China mainland Android models may have eSIM functionality disabled. If you are unsure, search for “eSIM” directly in your phone’s settings

How to Check Whether Your Android Phone Supports eSIM

Method : Check in Phone Settings (Recommended)

1. Open Settings
2. Go to Network & Internet / Connections
3. Tap SIM Cards / Mobile Network

Look for one of the following options: Add eSIM / Download SIM / Add mobile plan (eSIM), if you see any of the options above, your Android phone supports eSIM.

Complete Steps to Install eSIM on an Android Phone

Step 1: Enter the eSIM Setup Page

1. Open Settings
2. Tap Connections / Network & Internet, or whatever is similar on other device models.
3. Go to SIM manager
4. Tap Add eSIM 

Step 2: Scan the eSIM QR Code

1. Select Scan QR code
2. Use your phone to scan the eSIM QR code you received
3. Wait while the system downloads the eSIM profile (usually 10–30 seconds)

Step 3: Confirm and Complete Installation

1. You'll see a message saying “Adding mobile plan", tap Confirm / Enable
2. The eSIM will now appear in your SIM card list

📌 At this point, the eSIM is successfully installed, but may not yet be activated.

Android eSIM Activation and Usage Settings

1. Set the eSIM as the Primary Data SIM
   Go to: Settings → Connections / Network & Internet → Default Mobile Data → Select your eSIM plan（The system will display the newly added mobile network. Select it.)Tap the button to turn the eSIM on.
2. Enable Data Roaming 
   Most eSIMs, especially for travel, require data roaming to be enabled
   Go to: Settings → Connections / Network & Internet → eSIM → Data Roaming → Enable

   👉Enabling data roaming does not mean additional charges, it will only use the data included in your purchased eSIM plan.

3. Wait for Automatic Network Connection
   It usually takes 1-5 minutes for your phone to connect to the local network.
   This is normal! Initial connection might take a little longer.
   

Common Issues & Troubleshooting

1. QR Code Scan Failed / Invalid QR Code Message

Possible reasons:

• The QR code has already been used
• Unstable network connection
• Incorrect or blurry QR code image

✅ Solutions:

• Switch to a different Wi-Fi network
• Use the manual activation code input
• Contact customer support to request a new QR code

2. Installed Successfully, but No Internet Connection

Please check the following in order:

• Is data roaming enabled
• Is the eSIM selected as the default mobile data SIM
• Are you located within the plan’s coverage area
• Restart your phone once

Can I Delete the eSIM? Can I Reinstall It After Deletion?

❌ You can delete an eSIM, but once it’s deleted, it cannot be reinstalled.

If you need to change devices, contact the seller in advance.

Important Notes When Using an Android eSIM (Avoid These Pitfalls)

⚠️ An eSIM can usually be installed only once
⚠️ Avoid resetting or switching SIM cards frequently
⚠️ It is recommended to install before departure and activate after arrival
⚠️ Be cautious before system updates or flashing the device