Upgraded IPhone 13 not ringing

[HelpJacTuf]

I upgraded my iPhone 7 to the 13 on Thursday (today is Sunday). I managed to move everything over to the new phone manually and I can use all of my apps, the internet etc. but I can’t make calls from the new phone. If I ring my number from my house phone my old phone rings? I can send texts, use WhatsApp ok but if someone contacts me, the old phone beeps to indicate there’s a message/email? What do I need to do, in simple terms please, I’m not very techy!

[MI5 · Accepted solution]

@HelpJacTuf 

You need to use your old sim in the new phone or do a sim swap to activate the new sim Guide: Sim Swap: a mini guide 2017 update