Popular choices for bringing Android 5.1 or 6.0 features to the device. TWRP (Team Win Recovery Project):
Load the rawprogram0.xml and patch0.xml files from the firmware folder. Firmware ZTE Z970 ZMax
Sometimes, after an update, a ZTE ZMax might lose signal entirely, showing "No Service" or "Unknown Baseband." This indicates a corrupted modem partition. Flashing the official firmware restores the modem files and usually fixes the IMEI and signal reception capabilities. Popular choices for bringing Android 5