1. How can I change the number of the SMS service center so that my SMS can't be sent out?

1, an Android product from 1.6 platform, the system will automatically call the SIM card SMS service center number, and users do not need to set it separately.

2. In the case of receiving the short message but unable to send it, judge whether the SIM card used by the user is an old SIM card that has been used for many years. At that time, due to technical constraints, SIM card could not store the number of SMS service center. In this case, the operator can replace the new SIM card to solve the problem (only change the card without changing the number).

3. (Note: You don't need to notify the user for the following operations. Solve the problem according to the second item above, because other operations of the code menu will cause the phone to be abnormal, such as there is no network, so you need to tell the user not to adjust other menus. )

Android products can query the service center number status through the code, enter * # * # 4636 # * * in the dialing status, enter SMSC at the bottom of the mobile phone information-page, and click Refresh-if the SIM card is normal, the SMS service center number will appear (this is the number normally stored by SIM, and it does not need to be changed without special circumstances); If there is an English error prompt, it means that the SIM card service center has not stored it or it is abnormal, and it is necessary to replace the SIM card for the operator.