turn off the device during the process. A power failure during flashing often results in permanent device failure. www.ycict.net 2. Where to Download Firmware
: Once finished, perform a factory reset to ensure all "fixed" features are active. Caution on Third-Party Links ZXHN F660 V8.0 FTTH zte f660 firmware v80 fixed download
Essay: The Digital Lifeline—Firmware Integrity and Network Security turn off the device during the process