International usage

[KL6]

I’m currently in Germany and have the international usage bolt on active. However I am unable to connect to data roaming.

[MI5]

@KL6 

Some things to try:
Check data roaming is on in phone settings.
Manually search for another network
Turn off 5g
Change your data APN to "mobile.o2.co.uk"
Check with O2 whether you have a roaming bar on your account. Do this via social media
If you message O2 on Facebook ( https://o2uk.co/O2CFB) , Twitter ( https://o2uk.co/O2CTW) or Instagram ( https://o2uk.co/O2CIG) , they should be able to help.

Guide: How to find help & contact O2 

[pgn]

By the way, you do not need any special bolt-on for roaming in Germany on an O2 UK PAYG or Contract phone - it is all included as explained in https://www.o2.co.uk/eu-roaming @KL6 

The tips given above will help get you back on-line now you are in Germany though - enjoy your travels.