[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] sdevans80:
Please forgive me if this is in the wrong spot or if I broke some forum rule, I have never posted here but I have read a ton, thanks for all the help you guys have posted by the way.

First off I am not by any means an expert on computers and rooting but I have a decent understanding of the basics and can easily follow online instructions to root. I obviously have a d2att, I recently rooted it. I was happy with it unrooted for nearly a year but when samsung released the 4.3 update my phone really started sucking. Eventually I decided to root just to get a rom that functions better. I have been running gummy rom kit kat, I think its the nightly from march 10th, I have had no real issues other than some random reboots here and there. My mom begged me to root her d2att because she also was tired of the buggy samsung 4.3 update. I eventually rooted hers, even though I really didn't want to, knowing that I would get calls about every little issue and I would have to run and fix it... anyway

She has had issues that I have not had, she says that her phone randomly turns to silent periodically and causes her to miss calls, and she also says her bluetooth is intermittent. I don't use blue tooth at all so I wouldn't know but I have not had an issue with randomly going to silent. I have tried a lot of custom roms over the past 2 months since I rooted, including CM11, CM10 (all of them), AOKP, slimroms, of course Gummy, and a variety of others. All of them have had some major bug that is unbearable, from not connecting to wifi or not sending and receiving MMS, except for gummy which I have only had the random reboots.

Okay, so when I rooted mine originally I made a nandroid copy of the original rom after I rooted it, I didn't realize but somehow this nandroid file created to my internal memory instead of my sd card, so when I loaded a custom rom it was deleted. Like I said I'm far from an expert and that was a huge mistake. So anyway when I rooted my moms (same phone) I made a nandroid of her stock rom after the root and saved it to my computer, tablet, flash drive, external hd... etc.

Now that she is having problems with the absolute best ROM that I have found functionality wise, I thought I would restore her stock rom and debloat it, try my best to get it running better. I used her nandroid back up and restored my phone to it, only to get a ton of errors, everything was force closing. I kept getting the popups that "unfortunately ... has stopped" they were nonstop. Literally all I could do was hit ok and try to do the same with the next window, finally I get rid of those and the phone wouldn't run any apps or make any calls etc. So I rebooted to recovery and went restored my nandroid that I made earlier that day and all is fine with my phone again.

So here is my questions. First off when I made the nandroid of her stock rom I renamed the file STOCKROM, that way I would def know what it is and to not delete it. Will renaming a nandroid file make it not work correctly?

Also would a nandroid back up of her phone simply not work correctly on mine? I thought it would but it def does not. Maybe there is saved data that doesn't match my sim card.. I have no clue.

If I used this nandroid on her phone do you think it will work corretly?

If I messed up the file be renaming it, does anyone have a backup for stock that I can possibly use?

Last but not least, any recommendations for custom roms for d2att? I really just want speed, and no bugs

I am really sorry about the excessively long post, but I wanted to fill in the background info before I asked my questions, in case it was needed. Any help at all will be greatly appreciated.

Again please forgive me if I broke a forum rule or posted in the wrong spot, I don't typically post on any forums ever, I just tend to read the posts of others. THANKS IN ADVANCE FOR ANY AND ALL HELP, GREATLY APPRECIATED.