iMessage
I’m being charged for iMessage and Facetime and it’s taking all my credit although I turned them off in settings! How is that? And how can i stop being charged
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If your iPhone is used with a carrier not found in the wireless carrier articles, an international SMS is sent each time you activate iMessage/FaceTime. (One SMS Only)
If there are 4 SMSs that indicates you have activated iMessage 4 times.
Each time you change the SIM or activate iMessage/iCloud/FaceTime you must have got these warnings (As Shown in the pic below). If you had tapped on OK then only then the SMS is sent .....
See the pic below
If you wish not to incur international charges then please do not activate iMessage for phone number, as shown in the pic below.