[Q] Help me Unroot my GT-I9300!! (Im a Beginner) topic

hello...i followed a video to root my Galaxy S3 GT-I9300 and it automatically installed CWM Recovery Version 1.5 (non touch) and rooted my phone...now i want to go back to stock firmware ...but the problem is i purchased my phone from SIngapore and don't know which firmware i should download from Sammobile.com to unroot .....can i use any firmware (i.e. Firmware of any region for the unlocked GS3 GT-I9300) ...will it brick my phone.??? plz help....thanks in advance...

[Q] note 3 beginner questions before custom rom install topic

Hi,

I am looking at flashing some custom roms to see which one I like, I have got root by using the cf-auto root by cahinfire but, before I begin I just want to make sure that I back every thing up correctly to avoid any trouble further down the line.
As I understand it ( I use the term 'understand' loosely ) I need to back up the EFS folder and imei
Is that all that is needed? or is there something else that i should do? essentially I would just like to ensure that I can revert back to a stock rom, im not that concerned about knox or warranty. Im sorry if this has been brought up before but as a novice I would appreciate some assistance in gaining a proper understanding of the requirements before starting off

thanks

[Q] Need help beginner topic

I have rooted my HTC one. I did install a custom rom using twrp Download Android 4.4 KitKat Sense 5.5 Stock ROM (odexed) for HTC One.

It said it succeeded but never booted into system. Maybe I didn't wait long enough. At that point I used twrp to restore my back up. The backup succeeded but my data service does not come on and the phone is rebooting over and over.

Should I factory reset? Can I? Should I install another rom? Need some help.