What's the matter that the newly bought Apple 4S can't send text messages?

1, your mobile phone is definitely not more than 4 generations of Apple, otherwise the mobile phone uses a small card, and the traditional big card must be cut open to use.

2. Apple mobile phone has no SMS center number setting. It automatically matches the SMS center number by identifying the operator.

3. Are your two cards the same operator? If not, it may be that the phone number was not correctly recognized when changing the card, and the number of the SMS center was not matched, which is the reason why you can't send SMS.

4. If SMS can be sent but MMS cannot be sent, there is also the problem of limiting the size of MMS. Solution: If there is only a problem with SMS, here are specific solutions. If only MMS has problems, change the size limit of MMS to 334400. How to query the number of SMS center with iPhone?

Click "Phone" on the home screen, select "Dial Keyboard", then enter "*#5005*7672#" and click "Call" to see the SMS center number set by iPhone.