BBK y 15t SMS shows that I'm sorry that SMS has stopped running. How to make SMS run?

According to your description, I suggest you try the following actions to solve it:

1, enter Settings-General-Application-All-Find the program and click to enter the information interface-try to clear the data.

2. I suggest you restart your mobile phone.

3. If the mobile phone system is not the latest, try to upgrade the mobile phone to the latest version. You can go to Settings-General-System Upgrade-Check the update immediately, download the upgrade package according to the prompt, click Check Installation, and the phone will restart and automatically enter the upgrade mode.

4. Try to clear abnormal data through "Settings-General-Restore Factory Settings-Clear All Data". Note: This item will lose all the data stored by the user on the mobile phone, including phone book, SMS, third-party application software and related account information, and the data stored on the T card will not be lost.