AT&T S4 I337 Unlocked android upgrade help!

hey guys, ive got an AT&T S4 I337 that I bought brand new that is unlocked. Its at android 4.4 and cant do any upgrades because im not on the at&t network (im in canada, using rogers) Gives me the wait 24hr error when trying to update. Is there anyway to upgrade my android os? :) any help would be great, thanks!

[Q] Switching out the motherboard in the i337

Hi everyone! I have a bit of a dilemma.

I bought two AT&T S4's from a seller from on eBay. One for my Mom, and one for me. Now, the listing says that the phones are guaranteed to have a clean ESN and IMEI, are activation ready, and all that good stuff! So I get the phones yesterday and check both IMEI numbers and they check out. I went a step further to see if I could get them unlocked, because hey, why not? No dice. One phone's service contract hasn't been completed, and the other phone's Next payment plan hasn't been paid off. So I'm sitting here like . . . . okay, so will they both eventually get blacklisted? I sent the seller an e-mail about it. I could care less about unlocking the phone, but I do care about having the IMEI blacklisted some day out of the blue and not being able to use the phone, but that's another story for another day.

If the seller gives me some push back and things don't work out, I was thinking about switching the motherboard's out. I know another i337 motherboard would work just fine, but what about an M919 motherboard. Are they interchangeable? Just wanted to know! Thanks :)

Solution to wifi lockout when rooting Galaxy s4 i337

Like many others I ran into a problem when rooting my i337. If you follow the popular instructions, you are told to install towelroot after loading the NC1 firmware. Like many, my wifi was disabled after loading NC1 leaving you stuck. On NC1 my PC would also not recognize the i337 as a drive so that wouldn't work either. Fortunately I noticed that Bluetooth was still functional and used it to download the towelroot apk from my bluetooth enabled pc.

I hope this helps someone else stuck in this position. I struggled for hours before noticing that bluetooth was working.

"Old" I337 Galaxy S4 failed to root and now won't boot normally

I have two ATT I337's and wanted to root them both. The first and newest one worked fine but it has a busted screen and is locked. It was my test run and went very well except for the wifi problem that many others had trying to load towelroot from the net. Btw, it would be helpful to all going forward if someone would edit those instructions to download say towelroot first!!! I found a solution that I will post later.

Unfortunately my second and primary phone failed early in the process. After I loaded NC1_Stock, it would only boot to either the Recovery menu or the Odin menu. I have tried loading NC1 again, tried NJ4, tried safe mode (will not load), pulling the batt, factory wipe (ouch) and then tried emergency recovery in Kies. NOTHING is working. I did notice that the sticker in this I337 has NO serial number! So with Kies I used the serial from my broken one, on the second one. Unlike my other one which has a serial number on the sticker. So I am not sure if this is an older model, a refurb or what.

I must admit that I did NOT check the original firmware version when I started this process.

In any case I am looking for ANY options to get my i337 working again. Are there any other firmware versions to try? (link pls) Anyone? A phone that only goes into recovery or Odin mode is not much fun!