Question [Q] Home screen loop

3 days ago i tried to flash a new rom.
For now my phone just loop home screen. I already read many tutorials/suggestions but still can't fix problem.

BTW. same problem is with recovery. I can start it only by bootloader, recovery won't load by press power+vol up, whetever.

I already flashed few different roms, few different boot.img, erase cache (by fastboot) tried with CWM, TWRP.

Right now i have TWRP v2.7.0.1, flashed Viper XL v.2.0.0 with their boot.img

all what i need is knowledge about WHY my HOX+ can't load OS and also what the heck is AT&T etc. !?