Since you cannot download from ZTE directly, here are the three legitimate ways to obtain the latest firmware.
A: The ISP may have staged rollouts. They can also blacklist certain serial numbers from updates. You will need to request a manual push via customer support. zte f670l latest firmware download
Finding the latest firmware for a ZTE ZXHN F670L Go to product viewer dialog for this item. Since you cannot download from ZTE directly, here
ZTE provides firmware to OEM partners only. Unless you have a support contract, you won’t access their internal FTP. you won’t access their internal FTP.