First, distinguish between what you can check yourself and matters that require confirmation from the service provider or transport operator. When travelling abroad, your mobile phone acts as your ticket, map, bank access and address book all in one. You should therefore check all your settings at home and back up any critical data using a secure offline method.
What to do before your trip
Update your apps, set up a screen lock, enable Find My Device, and keep your backup codes separate from your phone. Check that the necessary features work without Wi-Fi. Do not use public Wi-Fi networks for high-risk operations if you can postpone them until you have a secure connection.
- Setup
- Activation
- Toggle point
- backup connection
Step-by-step plan
Draw up a short list of facts: what is already known, what is missing and where to clarify this. Work through it step by step, without mixing several issues in a single request.
Keep a copy of the key data offline and have a backup plan in case the main approach doesn’t work.
Useful links
Read more about mobile internet in Europe, SIM PIN codes and offline maps. Up-to-date flight information is available on RedRay. For rules that may change, refer to the European Commission’s official section on cybersecurity and the official resources of your destination country. Sources verified on 6 September 2026.
Questions and answers
Set-up: what do you need to do?
Set up your eSIM profile at home using a reliable Wi-Fi connection, but check the activation timing against your tariff terms and conditions.
Activation: how do I check?
Do not delete the QR code or the email containing your eSIM details until you have checked your connection.
Switchover: when should you prepare?
Switch off data roaming on the SIM you’re no longer using to avoid accidental charges.
Backup connection: where to find out more?
Save the offline switching instructions and keep a backup means of communication with you when crossing the border.