After spending up to 2 weeks battling with my formatted Tecno H6 I discovered the following;
Games hang a lot
Screen blinks
Keyboard forces close and so on

Here is the solution

When you format any rooted mtk Android (am not sure of others) it would restore the phone to factory settings and applications

The phone automatically installs a Chinese Rom Superuser as default thereby making the phone to run two superUser at the same time

In my case I have kinguser and Rom Superuser on my phone thereby causing conflict which affects the way applications are being run

Solution

Disable one Superuser and allow one to work

If mine was that simple it would av been great. Mine is an Innjoo phone after formatting d fone (rooted) it got wiped as usual, now to get back my root is a problem. It started force closing non root apps like greenify while root apps including SU or superSU (keeps saying x application not installed) also refuse to work. Searched everywhere online no solution. Only solution is to flash the rom.

Oxasbi:
If mine was that simple it would av been great. Mine is an Innjoo phone after formatting d fone (rooted) it got wiped as usual, now to get back my root is a problem. It started force closing non root apps like greenify while root apps including SU or superSU (keeps saying x application not installed) also refuse to work. Searched everywhere online no solution. Only solution is to flash the rom.

Have you tried re-rooting the phone after the reset, and Try to check if there are two SU after the reset because those applications giving conflicting permissions would lead to application to force close

zenith4biz:


Have you tried re-rooting the phone after the reset, and Try to check if there are two SU after the reset because those applications giving conflicting permissions would lead to application to force close

I did all that but still nothing. I guess u were luck.