Why can't the US version of Apple 4s send text messages?

1. No mobile phone card is inserted, and no dialing service is provided.

2. The mobile phone card has poor contact and the chip is about to be damaged.

3. The other party's mobile phone number does not exist or is wrong.

4. The mobile phone is dead.

5. The mobile phone is turned off.

6. The mobile phone is a model machine.

7. The mobile phone is locked. Without a card, the network cannot be unlocked, and the mobile phone card cannot be used.

Solution:

1. Insert mobile phone card.

2. Replace the mobile phone card.

Please enter the correct mobile phone number.

4. Charge in time until it can be turned on.

5. Turn on the phone.

6. Buy a real iPhone.

7. Insert the appropriate card to unlock it.