Son and I were in town today. I went shopping while he had an appointment and we agred he would call my mobile when he got out of his appointment.
My mobile is old-fashioned T Mobile Pay-As-You-Go with lots of credit on it.
So I wander around town for an hour - no call made to my mobile.
I go to ring his mobile and notice my mobile screen says 'Unregistered SIM'.
I can't make or recieve calls.
Got home and rang T Mobile. They tell me my SIM has 'expired' and I need to buy a new one. No way I say. What about my existing PAYG credit?
They finally agree to send me a new SIM that will allow me to keep my number and credit - by Friday!
First operator hands me to the next operator who seems to imply that the SIM is not 'expired' but faulty - so will send a new one.
Have very little faith in T Mobile after this.
What if this had been an emergency and I was relying on this phone?
I suspect they do this deliberately to drive us PAYG users onto contracts. They also wanted to register my name, address etc and in the old days when I first got this phone it could be activated anonymously so they didn't have those details.
Hate 'em.