Data coverage in Italy, france, Switzerland & germany?

[Yasser1]

Anyone can help and confirm that O2 data will work in the Data coverage in Italy, france, Switzerland & germany?

[MI5 · Accepted solution]

@Yasser1 

Yes should all work fine.

Free EU Data Roaming Abroad | O2

[Enlli]

To guarantee connection to Italian, German and Swiss networks make sure you have 4G Calling Active on your account and phone.

I know this is about data but there have been cases where people have had difficulty in getting onto a network without 4G calling

[CG2011]

I got a weird thing that happened. When I landed in swiss it worked for about 4 hours. Then I had no coverage. Then I thought it was an account issue or payment not going thru on my plan so I paid it again. After toggling my data on/off it worked for about 2 hours then shut off again. I even added bolt ons and still had issues. No clue what works and doesn't because I had both, but mostly it didn't work. 

[Enlli]

Does your phone have 4G Calling (VoLTE) turned on. 

If it doesn't the phone may not connect in places or try to connect over 2G