Roaming not working

[MI5 Level 94: Supreme]

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@Ezeh wrote:
I don't know why I can't make outgoing calls with my o2... Could someone help me with that please

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@Ezeh 

Not without more info.

Probably best you contact customer service Guide: How to find help & contact O2 

[Haysam]

My iPhone X 4G not working in Europe

[MI5 Level 94: Supreme]

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@Haysam wrote:
My iPhone X 4G not working in Europe

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@Haysam 

Try changing your data apn to "mobile.o2.co.uk"

If that doesn't work, contact customer services to check if any roaming bars are enabled Guide: How to find help & contact O2 

[Blomster]

Once changed to new APN is there a different password to put in too?

[MI5 Level 94: Supreme]

@Blomster 

No, password doesn't change.

[Mammamia02]

What is password and username for changing apn from idata.co.ukmyy username vertigob to mobile.o2.uk as suggested to enable 4G roaming for mobile data?

[Mammamia02]

And can one just keep it on mobile.o2.uk permanently?

[MI5 Level 94: Supreme]

@Mammamia02 

Password doesn't change. 
You can leave it, but visual voicemail won't work when back in UK. 

[Jakub1]

Hello, my calls abroad cancel before they are even connected... "Call cancelled" It says... Any solution. I am calling Poland mostly. When I text it is alright.

[MI5 Level 94: Supreme]

@Jakub1 

Usually means the network can't handle the call if abroad, or are you calling from UK?

Try manually searching for a different network if abroad.

It will also help to know if you are contract or PAYG.

Spend cap if on contract?

Credit if applicable on PAYG?

Using the correct dialling codes etc ?