System crash/ bug

Solution
Shut it off and then try starting it in "Safe Mode". If it starts up fine in that mode, then there is probably a bad app, virus or malware on the phone. You will have to remove said problem before you can use the phone correctly again.

NOTE: When in "Safe Mode" you can't access many apps and files. It is a restricted mode.

To get into "Safe Mode" please do the following.

1. First turn off the phone.

2. Next press and hold "Power" until you see the manufacturers logo on the screen, then release the power button.

3. "Quickly" press "Volume Down" and hold it for few seconds until you see the message "Safe mode: ON" or something similar.

4. If you wanted disable it, simply repeat the steps above, and you should see "Safe Mode: OFF"...
Shut it off and then try starting it in "Safe Mode". If it starts up fine in that mode, then there is probably a bad app, virus or malware on the phone. You will have to remove said problem before you can use the phone correctly again.

NOTE: When in "Safe Mode" you can't access many apps and files. It is a restricted mode.

To get into "Safe Mode" please do the following.

1. First turn off the phone.

2. Next press and hold "Power" until you see the manufacturers logo on the screen, then release the power button.

3. "Quickly" press "Volume Down" and hold it for few seconds until you see the message "Safe mode: ON" or something similar.

4. If you wanted disable it, simply repeat the steps above, and you should see "Safe Mode: OFF" rather than on.
 
Solution

rgd1101

Don't
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MERGED QUESTION
Question from muhammadahmed2901 : "System crash/ bug"