Can I flash roms with
adb sideload without rooting my android device ?
I have tried installing custom recoveries once, but it didn't work. I had rooted my android device before, but due to some reason, I unrooted my device. From then, I can't root my device because, when I try to root my device with Framaroot, my phone hangs for a few seconds, and then the app just closes itself directly. I also tried to root using the Kingo Root app, but my phone just restarted several times. It was of no use.
I am using Samsung Galaxy Core GT-I8262 running Android Jelly Bean 4.1.2. I have tried factory resetting the device, but it was of no use. Please help me with this problem.