iPhone setup (iOS 26)

Once the Atli eSIM is installed, set these four things.

1. Turn data roaming OFF on your regular SIM

This is what stops your normal operator charging you for roaming.

• Settings › Cellular › SIMs › tap your regular SIM, the one with your phone number under it
• Scroll to Data Roaming and turn it off
• Tap Back

Or switch the regular SIM off entirely for the trip:

• You will not get calls or texts on your normal number while it is off
• WhatsApp, iMessage, FaceTime, Messenger and the rest keep working over Atli data or wifi

2. Set up the Atli eSIM

• Settings › Cellular › SIMs › tap Atli
• Turn the Atli eSIM on if it is off
• Data Mode › Low Data Mode
• Go back

Low Data Mode keeps iOS from spending your data on background jobs like system updates.

3. Choose Atli for cellular data

• Settings › Cellular › Cellular Data
• Pick Atli

Your phone uses Atli for data for as long as Atli is selected here. Back home, select your regular SIM again and turn the Atli eSIM off until the next trip.

4. Turn off iCloud backup over cellular

Recommended. A backup can use a lot of data without you noticing.

• Settings › Apple Account › iCloud › iCloud Backup
• Turn off Back Up Over Cellular