All supported Android versions:
There are currently several custom roms available. Lineage OS 14.1 rom is alpha and with many lacking functions. Roms based on marshmallow work fine.
I am able to:
Root the phone with either Magisk or SuperSu.
Install and run TWRP 3.1
Install modded Xposed v87 by wanam
Successfully patch rom with nanodroid signature spoofing support.
Right now I am trying to get microg running properly.
XDA J2 Prime forum
is the current ROM official or unofficial:
|Chipset |64bits - MediaTek MT6737T (28nm)|
|CPU 1.4Ghz Quad-Core ARM Cortex-A53|
|GPU |ARM Mali-T720 MP2|
| RAM|1,5GB LPDDR3|