[T-Mobile, Samsung Galaxy SIII] crayzeeteri:
Yep!

Yeah, I bought the Apex Pro, and I don't normally buy many paid apps - I just really like how easy it is to integrate with other things like themes, which I mentioned earlier, and then other things too, ie; lockscreen apps, status bar apps, fonts, icons...so even if I want just one thing different that Apex doesn't have, I can still get that thing and use Apex at the same time!

Rooting!! OK here's what I did, and not a single problem! This is the fastest, easiest time I have ever had rooting and/or flashing by a MILE! I was leery due to the IMIE issues being reported and also, like you, the flash counter voiding the warranty. (if anything happened and I was out of an almost $700 phone, I'd be seriously PISSED!!) So if you do decide to root and/or flash, I would HIGHLY recommend doing these things! 1st, go here: http://xdaforums.com/showthread.php?t=1804123 and back up your IMEI. Just follow the instructions (super simple) to make a backup. I don't think u need to do a full NV backup (u'll understand what that means if u read thru the posts on this issue, but it doesn't matter) because you'll already have your IMEI backed up beforehand. I did it anyway tho, just because I felt safer that way. Up to you! Bookmark that thread tho, in case you ever encounter any IMEI or data probs cuz they're the go-to guys for that, and have all the RIGHT fixes! You'll see the other guy I'm referring to's method and a link to his thread referenced there, where there's a lot more background info, but the guy's thread I gave you the link for is WAY easier for performing the backup. As far as checking the backup to be sure it's there, that can get confusing - If you followed the directions, I promise it worked, just gets techie when trying to read phone stuff on a PC. All info on the subject is in those 2 threads, you'll see it! N E way, do that FIRST BEFORE ANYTHING!!

Next, go here: http://xdaforums.com/showthread.php?t=1746682 and install this to your PC. This is the coolest thing ever to get you backed up, rooted, flashed, whatever. It's called the "Snapdragon Toolkit" I cannot begin to say enough about it! It does EVERYTHING you need - installs the correct drivers, roots, unroots, flashes ROMs, gives u ClockworkMod Recovery AND Odin, and also gives you a full perfect backup - Nandroid backup for CM, .tar file for ODIN - of your stock firmware to keep on your PC in case you run into an issue or just decide to go back to stock. Also provides a walk-thru for resetting the flash counter back to zero using an app called Triangle Away by Chainfire!! It gets u into download mode, roots, gives you Superuser, busybox, CWM, all necessary root stuff, and reboots your phone all automatically in just a quick click! You might have read secure vs insecure kernels - gives you the choice. Insecure leaves you rooted. You can also use it to just kind of temp-root to do something that like say, requires ADB (which requires you to be rooted to use) Do it thru the toolkit, and it will get you (for instance for adb access) the insecure kernel alone, temporarily, until you're done with your task. You can do each thing separately like that or everything all at once. His thread, as well as inside the toolkit itself, when you open it on your PC, gives you total kindergarten instructions and explanations for each thing it does. I have never seen a faster, simpler, more user-friendly program for getting these things done - and all in one place! So get that, and per the instructions, open it and install the drivers 1st before plugging in your phone with ur USB. You probably have the right drivers already, but just in case there are extra drivers there needed for the program or anything it does, I'd go ahead and install them. It'll then open a window that looks old DOS command-line like, and will ask which model you have. Every time you're making any choice in the program, you'll be typing your answer at the bottom of the screen and hitting "enter" to submit. Type the number 3, it's the one for T-Mo T999 UVALEM, and hit enter. It then displays the menu with the list of all the options. You can plug in to be sure the phone's detected, and check it by looking at the top of the window; it'll show it under "List of devices attached." If you do what I did, which was the all-at-once option, you'll hit the number 2 and enter for thr rooting options menu, then 3, enter to choose all-in-one and follow the on-screen instructions for when to plug in the phone and such.

To simplify things further, so you can save some time, I've got all the files you need already, to do your IMEI backup, stock firmware backup,(the Nandroid copy of the firmware and the .tar ODIN copy), the drivers, the most recent ClockworkMod Touch and ODIN files, the Toolkit, and all the .apk files of the apps that are safe to remove from the original firmware if you want that. I didn't remove all of these, for the same reason I haven't flashed AOKP or CM9/CM10 yet; I'm not sure I want to lose the new Samsung stuff like SVoice and the motion features. It's a list others comprised, actually probably really outdated, containing the ones confirmed safe to remove. I just kept in case I wanted any of 'em back! I can personally confirm all the T-Mobile ones, ChatOn, Flipboard, all the Yahoo stuff, self, factory and LCD tests, Samsung's Media Hub, Game Hub, SSuggest, and More Services, Google's Books, Music, TV/Movies, Talk, and Google+(Plus One), Amazon, Polaris Viewer, Facebook SMS, and the system Music and Video apps. I say probably outdated cuz I'm sure the Maps from Google and Samsung, the Cloud sync apps from them all, and the Email apps, for example, are all fine to go too, and probably verified by now. (I mean seriously, do I need Samsung, T-Mo, Google+, GMail, Dropbox, Sugarsync, AND Facebook ALL syncing my stuff?! JEEZUSS!!!) Anyway, all the files are in my dropbox here:

https://www.dropbox.com/sh/8f2wjlz1enkb8wp/saTe7MW0fE

There's also a way to flash CWM Touch Recovery without having to pay for Rom Manager Premium and without tripping the flash counter in there with instructions if you want it, but you have to be ok with entering command line script with adb or a terminal emulator. I just used the Triangle Away app, worked perfect!

Whew! What a novel, huh?! Just wanted to be sure I was thorough so you or anyone reading has specifics so there are no problems for you! I honestly didn't have a single hiccup, and all of it took less time than it's probably gonna take u to read this post! Have fun!