Abroad: off for your home SIM, on for the VoyaSIM line. That way your carrier can't bill you for data, and the eSIM, which works through partner networks, can connect. At home, keep roaming off on a regional or global VoyaSIM plan that also covers your country, or the plan starts early.
On iPhone
- Open Settings → Cellular (Mobile Data on some iPhones).
- Tap your home line and switch Data Roaming off.
- Go back, tap the VoyaSIM line and switch Data Roaming on.
- Under Cellular Data, choose the VoyaSIM line, and leave “Allow Cellular Data Switching” off so the phone never falls back to your home SIM's data.
On Android
- Pixel and most Android phones: Settings → Network & Internet → SIMs → choose the line → Roaming. Under Mobile data, pick the VoyaSIM line.
- Samsung Galaxy: Settings → Connections → SIM manager → Mobile data → the VoyaSIM line, then Settings → Connections → Mobile networks → Data roaming on.
- Switch off automatic data switching if your phone has it, so mobile data never moves to your home SIM.
Back home
Switch the VoyaSIM line off and set mobile data back to your home SIM. If the plan still has data and also covers your home country, leaving it on would use that data at home.
Frequently asked questions
Does data roaming off stop calls and texts?
No. It only stops mobile data on that line. Calls and SMS still reach your home number, at your carrier's rates outside its own country.
Why must roaming be on for the eSIM?
The VoyaSIM line is not issued by a carrier in the country you visit: it reaches you through partner networks there, so the phone treats it as roaming. You pay nothing extra; the plan is prepaid.