Too many airtime charges
I keep getting sms charge from my SIM ,even without sending a message
it does not happen on any other phone
it only happens whenever I put my sim on my phone
That can be expected. iMessage and Facetime activation sends an SMS message to a server in the UK, if your carrier does not support it, they can charge for it.
They will try to activate every time you insert the sim card into the iPhone.
Link-> If you can’t turn on or sign in to iMessage or FaceTime - Apple Support
