iphone 12 pro no service issue

[Clau11]

My new iPhone 12 Pro shows "No Service", restarted it, placed on Airplane mode to reset the service connection, removed and cleaned the SIM card - nothing worked. Any suggestions?

[MI5]

@Clau11 

Have you done a sim swap or you can use your old sim Guide: Sim Swap: a mini guide 2017 update 

[Clau11]

just did it and it's working fine . but the sim that was sent it is not a 5g sim or they are all the same ?

[MI5]

@Clau11 

All sim cards since October 2019 are 5g

[Clau11]

ok , so i need to ask for new one  , my one is 3 years old. Thank you

[MI5 · Accepted solution]

@Clau11 

Yes you'll need to call for a new one.

You'll need to call customer service.
Numbers here Guide: Coronavirus Community Help and Support 
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 you have to, to get put through to someone.
8.00am is the best time to call if you can.

[Clau11]

thank you for your help !!!

Spoiler

[MI5]

You're welcome