Unhappy [Q] [HELP] com.android.phon has been stopped unexpectedly.

Hello, My Name is Suraj Singh

My Device Xolo A500 is Popping Up " com.android.phone has been stopped unexpectedly." my device is rooted already so before it shown i intall "setcpu" app and i just did something wrong with that app so my device restarted automatically and in start it showing "Upgrading Android" then showing up "com.android.phone has been stopped unexpectedly."

i tried everything like factory data reset, sim slot changing method etc.

cant flash with pc bcoz my device usb debugging is off.

cant flash with stock recovery bcoz it showing
E: signature verification failed.
installation aborted.

please me help

can i on usb debugging option without using phone with pc or with any software ???
so please suggest me.

thank you.