Why does Apple always fail to send messages to 1069070069?

If the number to be sent by iphone is too long, it will be preceded by (), and 1069070069 will become (10)69070069. Iphone took this 10 as the country code, so the transmission failed. The one saved in the address book was deleted, and the number was changed to +86 1069070069. The transmission was successful.

1, open the phone, find the phone and click "Settings".

2. Click "General".

3. Find "Restore" and open it.

4. Click the "Restore Network Settings" option on the page.

5. You need to verify and enter the required password.

6. Select "Restore Network Settings" in the pop-up options to successfully send SMS.