eSIM Setup & Troubleshooting: iPhone & Android Activation (2026)
Bought an eSIM but not sure how to install it, or installed it and still can't get online? This eSIM setup guide walks through activation steps for iPhone and Android, the best moment to activate, and six checks for the classic "installed but no data" problem — follow it and you'll be online in your first minute on the ground.
What you get after buying an eSIM
Once checkout is done, your email brings three things: a QR code, an LPA activation string (the long line for manual entry), and setup notes. Most phones install by scanning the QR; a few need you to paste the activation string by hand. The whole process has two stages — first install the profile (needs internet), then activate it (once you arrive).
Below are the steps for iPhone and Android separately.
Installing on iPhone
- Connect to Wi-Fi first — installing the profile needs internet.
- Open Settings → Cellular → Add eSIM.
- Choose "Use QR Code" and scan the one in your email, or pick "Enter Details Manually" and paste the LPA string.
- Finish adding it on screen and set this eSIM as your data line.
Install the profile before you fly and activate after landing, so you're not fumbling on arrival.
Installing on Android
Menu names vary a little by brand, but the path is the same:
- Connect to Wi-Fi.
- Open Settings → Network & internet → SIMs → Download a SIM.
- Choose "Scan QR code", or pick "Enter it manually" and paste the LPA string.
- Once active, set mobile data to use this eSIM.
When is the best time to activate
Installing the profile and activating it are two different things. Install the profile ahead of time; activate after you land, because most plans count validity from the day you activate — activate too early and you burn days for nothing. After landing, switch the phone on, turn on this eSIM's data, and it connects to the local network automatically.
Installed but no data? Six checks
Work down the table one row at a time; most connection problems are something you can fix yourself:
| Symptom | What to do |
|---|---|
| No signal at all | Confirm the eSIM is on and selected as your mobile data line |
| Signal but no data | Turn on Data Roaming — roaming plans require it, and it costs nothing extra |
| Roaming on, still nothing | Check whether the APN needs to be entered manually (the plan notes include it) |
| No response after activating | Restart the phone, or toggle airplane mode for 10 seconds |
| Shows "No Service" | Make sure you're in a covered country and the plan is activated (validity has started) |
| Two SIMs fighting over data | Assign mobile data to the eSIM and keep your home SIM for calls and texts |
Still offline after these? Check the matching case in our FAQ, or just ask our AI advisor Stella and describe your phone model and what the screen shows.
Dual SIM: home number plus eSIM together
A phone bought at home keeps both a physical SIM and eSIM, and the smoothest travel setup is: assign mobile data to the eSIM for internet, and keep your home physical SIM in for texts (bank codes, two-factor). Turn off Data Roaming on the home SIM so you don't accidentally roam on it and get charged.
FAQ
Can I install an eSIM without Wi-Fi?
Installing the profile needs internet — Wi-Fi or another card that's already online works. Safest is to install it on Wi-Fi before you leave.
Can one QR code be installed more than once?
Usually a QR installs once; if you delete it, reinstalling means a reissue. Don't casually delete it, and check before switching phones.
How many eSIMs can one phone hold?
Most newer phones store several and run one or two at once, depending on the model. Not sure? Run the compatibility check first.
