I'm not good at english, but i'll trying
So, my problem is my phone with MT6737M chipset with 3.18.35 kernel version always bootloop when i run any task on TWRP (like installing zip or even backup) and can only be recovered using original system.img on sp flashtool, so i can't modify any systems on it. I trying to port some ROMs and convert it into system.img and flash it via sp flashtool but always bootloop (also convert original extracted Stock ROM to system.img to verify that converter works) but still bootloop (So, it can only be recovered by original system.img). how can i fix that?
edit : bootloop on my phone is just stuck on boot logo