Zte Axon M Z999 Firmware Best -

Here is a full review and breakdown of the firmware situation for the ZTE Axon M Z999.

(Extended, Mirror, and Dual-App layouts), which are not compatible with standard third-party ROMs. You can check for official updates via the AT&T Software Update tool or by visiting the ZTE Global Support page Custom ROM & Rooting Status zte axon m z999 firmware best

Stick with Stock Android 7.1.2 Build B15 (Unlocked) . It is stable, official, and the only firmware that correctly handles the dual 1080p displays. This is the "best" for 90% of users. Here is a full review and breakdown of

, as custom ROM support is virtually non-existent for this niche dual-screen device. Official Stock Firmware and Dual-App layouts)