The N817 is definitely a direct variant of the ZTE Tempo N9137. Ive got 7.1.1 & update the firmware all it can. I was thinking of modifying the firmware by flashing but I am unable to get into fastboot. Ive gotten into FTm mode tried kingo kingroot, and iroot. Ive tried disabling the hardware force protection by adb reboot force encryption mmvcsp. I removed it (I think) and then ran the above apps with no success.