How to avoid roaming charges on your main SIM
With your travel eSIM handling data abroad, you want to be sure your main SIM doesn’t use data while roaming — otherwise a surprise bill could be waiting when you get home. Here’s how to set it up before you fly:
iPhone: Turn off Data Roaming for your main SIM
Open Settings → Cellular. Select your main SIM — the line with your phone number — and turn off “Data Roaming”.
iPhone: Select the eSIM as your data line
In Settings → Cellular → “Cellular Data”, select your travel eSIM. All data now goes through the eSIM — and remember to turn Data Roaming ON for the eSIM itself; it needs that to work abroad.
Samsung: Data roaming off for your main SIM
Open Settings → Connections → SIM manager and select the eSIM for Mobile data. Then go to Settings → Connections → Mobile networks and turn Data roaming off for your main SIM.
Google Pixel and other Android devices
Open Settings → Network & internet → SIMs. Select the eSIM for data and turn Roaming off for your main SIM.
Your main line: on or off?
The safest option is to switch your main line off entirely while you’re away — then there is no risk of charges from your home carrier. If you want to keep it active for SMS and calls (e.g. bank verification codes) you can leave it on, but note that calls and SMS may generate charges from your carrier. Prefer internet calls (WhatsApp, FaceTime, Messenger) while abroad.
Menus can look slightly different depending on your phone model and software version. If in doubt, drop us a line at support@esimfortravels.com — we’ll help you get set up.