Why is the SMS sent by Samsung s6 a black screen?

I'm very sorry for affecting your normal use. According to your description, please refer to: please press and hold the power button and volume button for more than 7 seconds, try to restart the phone, connect the charger, uninstall and delete the recently installed software, and rule out whether it is caused by software incompatibility. Use intelligent manager to optimize the memory of mobile phone and back up data (contacts, text messages, pictures, etc. ), upgrade the phone to the latest version and reset the phone. If the problem still exists, it is recommended to bring the shopping invoice and.