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by jsz0
5048 days ago
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Your phone number is associated with your Apple ID. So I'm guessing they just reverse lookup the number you're texting to determine if iMessage can be used. It can definitely be reserved engineered. Just text any number from an iOS device and see if it switches to iMessage. The only caveat is users can remove their phone number association with iMessage so you could never be 100% sure. |
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