A: Yes. Always backup your APN, server IP, and admin number before flashing.
: Native support for MP4, AVI, and ASF formats. firmware do gps foston fs 460 dt yg 912c
He connected his USB-to-TTL adapter. The voltage was set to 3.3V. He shorted the CLK pin to Ground to force the processor into a bootstrap mode, bypassing the corrupted bootloader. A: Yes