Avoid random file hosting sites (Mediafire, 4shared, etc.) offering "unlocked v9.0 firmware." Many contain malware or are incomplete dumps that will brick your ONT.
: The most secure way to obtain the firmware is through the ZTE Support Document Center , which lists the ZXHN F660 V9.0 among its supported products.
Avoid random file hosting sites (Mediafire, 4shared, etc.) offering "unlocked v9.0 firmware." Many contain malware or are incomplete dumps that will brick your ONT.
: The most secure way to obtain the firmware is through the ZTE Support Document Center , which lists the ZXHN F660 V9.0 among its supported products. zte f660 firmware v9.0 download
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