Welcome. I have a ZTE Blade III. The phone constantly reboots or got bootloop. I tried to install the system from the manufacturer but displays the error: "signature verification failed, instalation aborted". Is there a way to installation any firmware by FTM mode? I know about android, so I think I can handle the repair but need help in finding software and program for flashing beyond recovery. Recovery installed is the standard android recovery (3e). Due to the bootloop I can not install CWM. I beg for help if wrong section please move. I'm new