
Firmware Rom is Flash by using Chinese Miracle tool.
The figure image on top picture shows the actual unit of Samsung SM-J310 Clone
This Samsung J310 i notice the INFO is J500H model, see the info using Cm2 MTK tools below
Created by Infinity-Box (c) Chinese Miracle II (c) 2016
Device Brand : Samsung
Device Model : j7252
Device CPU : MT6572
Device IntName : SM-J500H
Device Version : 4.2.2
Device Compile : 1/13/2017 3:37:51 AM
Device Project : J7252_5.0_V1.17 20170113-1137
Device ExtInfo : SM-J500H
The Samsung J310 aka J7252_5.0_V1.17 ROM was downloaded on net and i flash this using CM2 tools figure below.

And can be flash back using any Mediatek tool if you don't have CM2.
ROM support scatter base file like SP flash Tool.
⇨ How to Flash Firmware step by step procedure of SP Flash Tool
After finish flash using CM2 MTK tool

Note !As see the figure show a information about firmware above.
Be sure you read and understand the project version, information, Version ROM of Firmware.
and step by step before proceeding to program your device.
Firmware can use to the same model about having a problem about software related problem Hang, no power, password, pattern lock, infected by a virus, anything about software related.
The best safe way is manual select flash only the SYSTEM ANDROID or use MOTA SIU LIKE of SP Flash Tool to safe flash only.
Do it at your own risk, After flashing ! the device is set automatic in a reset condition, All user data is lost.
Make sure back-up first before to proceed to flash your phone.
Link 1 Link 2
RAR password
Thanks to Uploader the Rom backup is credit to him and i already use the file.
NVRAM Download
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