I can't send text messages if I change my mobile phone card. What happened?

Maybe the SMS center code in the mobile phone is wrong.

Solution: take your mobile phone to the mobile business hall; Do it yourself and find the number of the SMS center in the SMS function. The number of SMS center is +86 1380XYZ500(XYZ is your area code). If you are not sure, you can call 10086 to ask.

There may be an error in the mobile phone program or a problem with the mobile phone card. Detection method: put the mobile phone card in the mobile phone of a friend or family member to see if it can be sent, and then try putting the card of a friend or family member in the mobile phone.

Your own card can be sent on your friend's mobile phone, but your friend's card can also be sent on your own mobile phone. Then it is the problem of the mobile phone card. Maybe it's because it's been used for a long time. Some mobile cards are compatible with you. The solution is to change the card in the business hall or change the mobile phone with friends and relatives. (Sometimes this situation will recover after a few days of using the mobile phone. )

Did you send a group message before sending a message? If so, it may be that the SMS traffic exceeds the standard and the mobile company has turned off the SMS function. Call 10086 and ask them to find out if this is the reason. If so, see if they can apply for opening. If they can't come up with a solution. We just need to take our ID cards to the business hall to fill out an application form and open it every one or two days. )