What should I do if the newly bought Huawei SMS has stopped running?

You can restart the phone and clean up the cache garbage in the phone. You can also try to restore the factory settings after backing up the data in your phone. Generally, the SMS function will return to normal after restarting the mobile phone. If something goes wrong, take the warranty card to the after-sales service center for repair, and back up the data in the mobile phone before repair.