Specific firmware builds for Ukraine (LLCUAM79UV1.0.0B01) and Russia (MF79RUV1.0.0B02) have been hosted on repositories like GSM Hosting Files and HalabTech Support .

Like any software, modem firmware can be buggy. Some users experience frequent disconnections, overheating warnings, or issues with DHCP. ZTE occasionally releases updates to fix these stability issues, but they are rarely hosted on the manufacturer's main website for public download. This forces users to scour forums for direct download links.

A global stable firmware (vB04 or vB05) is sometimes sought for devices that need to be unlocked from carrier restrictions like Jazz Pakistan. Troubleshooting Update Issues MF79U - ZTE - Support