Oppo u70 1 failed to prompt for signature.

OPPO u70 1 failed to prompt for signature.

Suggest following the steps to try the operation? ：

The machine is fully charged. After backing up the data, have you turned it off? (off)? Be in a state of.

Long press? [Power button]? And then what? [Volume+]? Key 10 second? . After entering recovery mode.

Operation 2- Wipe

Choice? Shit? Data/factory? Reset; ? Choice? Shit? Cache partition

Choice? Restart? System? Now? Restart after the operation, and it's done.

If the problem is not solved after 2 wipes.

Suggestion? Is it off? (off)? In the state of? Long press? [Power button]? And then what? [Volume-]? Key, 10 second,?

Enter the quick start mode and connect to the PC. Wire brush official Rom repair system.