Airplane Mode & eSIM: Essential Phone Settings for International Travel
Master your phone settings for international travel. Learn when to use airplane mode, how to configure dual SIMs, and avoid surprise charges.
Published 2025-01-28 · Updated 2025-02-04 · TripSIM Team
Getting your phone settings right before international travel is crucial for avoiding unexpected charges and ensuring your eSIM works correctly. Many travellers are confused about airplane mode, dual SIM management, and roaming settings. This guide clears up the confusion with step-by-step instructions for both iPhone and Android.
Should I Use Airplane Mode Abroad?
Airplane mode turns off all wireless connections — mobile data, calls, texts, WiFi, and Bluetooth. You DON'T need airplane mode just because you're abroad. Instead, selectively manage your connections: disable data roaming on your UK SIM while keeping your eSIM active for data. This gives you full control without the nuclear option of airplane mode.
How to Configure Dual SIM for Travel (iPhone)
- Go to Settings > Mobile Data
- Set your travel eSIM as the 'Mobile Data' line
- Keep your UK SIM as the 'Default Voice Line' for calls
- Turn OFF data roaming for your UK SIM
- Turn ON data roaming for your eSIM line (this enables it to connect abroad)
- Enable 'Allow Mobile Data Switching' only if you want automatic fallback
How to Configure Dual SIM for Travel (Android)
- Go to Settings > Network > SIM Manager
- Set your travel eSIM as the preferred line for 'Mobile Data'
- Keep your UK SIM for 'Calls' and 'Texts'
- Disable data roaming on your UK SIM
- Enable data roaming on your eSIM
- Ensure your eSIM is set as the active data connection
Common Mistakes to Avoid
- DON'T leave data roaming on for your UK SIM — this causes charges
- DON'T put your phone in airplane mode with eSIM — it disables everything
- DON'T forget to enable data roaming for the eSIM line specifically
- DON'T disable your UK SIM entirely — keep it for receiving calls and texts
- DON'T panic if your eSIM says 'No Service' — it activates when you reach your destination
When to Actually Use Airplane Mode
- During takeoff and landing (as required by airlines)
- If you want zero connectivity for a digital detox
- To quickly stop all network usage if you suspect accidental roaming
- To save battery in areas with no signal (phone drains battery searching for networks)
Battery-Saving Travel Settings
International travel can drain your battery faster as your phone searches for networks. Enable low power mode, reduce screen brightness, disable unnecessary notifications, and close background apps. With an eSIM connected to a strong local network, your battery will last longer than constantly searching for a roaming connection.
Can I receive texts on my UK SIM while using eSIM for data?
Yes! Dual SIM lets you receive calls and texts on your UK number while using your eSIM for data. Both SIMs operate independently. You may be charged for receiving calls on your UK SIM abroad though — check with your provider.
Why does my eSIM show 'No Service' before I travel?
This is normal. Your travel eSIM is designed to connect to networks at your destination. It will show 'No Service' or 'No Signal' until you arrive in a country covered by your plan. Don't worry — it will connect automatically when you get there.