| Tool | Protocol | Difficulty | |------|----------|------------| | | TFTP | Medium | | PuTTY (with serial/TTL) | Serial | Advanced | | HxD + Bootloader commands | Hex/Memory dump | Expert | | ZTE Firmware Flasher by DC-Unlocker | Windows GUI | Easy (paid) | | Odin/ZTE Tool (unofficial) | USB DFU | Medium |