PAYG or Contract?
To make and receive calls in Italy you will need 4G Calling (VoLTE) turned on.
Try searching for different networks and try connecting even if it says forbidden
If PAYG switch down to 2G
This is our general roaming advice
Some things to try:Check data roaming is on in phone settings
Manually search for another network
Make sure 4G calling is on
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 mediaIf 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
This is not O2 and we are all customers here similar to yourself and cannot answer account type queries.
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