The number of the mobile phone information center is set incorrectly. What if it can't be corrected?

The number of the mobile phone information center is stored in the memory of the mobile phone card. If you really can't enter the "+"sign in your mobile phone, you can try to set the number of the short message center with someone else's mobile phone, and then insert it into your own mobile phone after setting it, and it will work normally. I hope my answer can help you solve this problem.