This is probably caused by a virus on the phone. It is best not to click to enter. The following is the general removal method:

1. Open the phone and enter the desktop of the phone.

2. Click the Security Center on the desktop to enter, and then select Virus Scan to enter.

3. Then run a virus scan and eliminate the detected dangers.

4. If it cannot be checked out, then restoring factory settings is a common method.