New phone won’t take calls or txt
I have recently bought an iPhone11 for my partner. She used to have an iPhone 6. We have swapped everything over and put a new Micro SIM card into her new phone11. However her 11 does not take calls or txt messages. Her iPhone 6 still takes the calls and txt messages. If she turns the iPhone 6 off, then she can’t take calls at all. How can we stop her iPhone 6 from taking the calls