If you cannot connect to the local mobile Internet immediately, go over this checklist before you do anything else.
- Restart your device several times as soon as you arrive abroad.
- Try to establish the connection with the different local networks manually through your device settings. One network may provide a more stable connection than another.
- Check whether the option 'data roaming' is enabled in your device settings. This will usually be available in the 'Mobile networks' menu.