SIM card has problem with the call connections

[SimonKap]

My SIM card when I put to iPhone 13 start to work correctly to the first talk after the gsm connection broken with the operator . I can not make another activity. 

It is repeated with all 5 gsm operator. 

What I should do with it I am traveling now and need data and phone calls to do ?

[Cleoriff]

@SimonKap 

Some things to try:

         * Make sure data roaming and mobile data is turned on in your phone's settings.

          * Manually search for another network

          * If you have an iPhone change your data APN to "mobile.o2.co.uk"

           * Try toggling Airplane mode on/off (it often helps kickstart things)

           * Drop down to 3G and see if that helps.

           * Contact O2 to see if there are any roaming bars on the account

[SimonKap]

this solution doesn't work 

What next I should do ?

[Bambino]

@SimonKap Download Skype Guide: A Guide to Skype to call O2  customer service on their Freephone numbers: +44800 902 0217 or +44800 032 1402 
When it comes to the reason you are calling, stay silent for 15 seconds and you will be taken to the keypad options.
Press 2 for Everything Else
Press 5 for More Options
Press 7 for Anything Else which will put you though to someone.
Say 'Upgrade', 'Lost/Stolen', or 'Fraud' if the suggestion above doesn't get you through.
Best time to call is 8 am.
You can also reach O2 via social media:
Facebook (https://o2uk.co/O2CFB), Twitter (https://o2uk.co/O2CTW), or Instagram (https://o2uk.co/O2CIG)

[Cleoriff]

@SimonKap 

Contact O2. Guide: How to find help & contact O2 (It's free from abroad)

Or you can 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 you with this.

Or call 0800 032 1402 via Skype Guide: A Guide to Skype

[SimonKap]

I did , after 3 days reached O2 service to fix options of voice calling but now my internet does not work even I see 4g , 5g or lte