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■ Why did the remaining balance run out so quickly?
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■ What happens when the data capacity runs out or expires?
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■ How to check the remaining data capacity and expiration date?
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■ What should you do if I receive the message "SMS messages sent and received to activate FaceTime and IMessage may be charged by your carrier"?
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■ What should you do when you get a notification that your phone number is currently being used by iMessage and FaceTime on my new iPhone?
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■ Can you use ride-sharing services?