[AT&T, Rogers, Bell, Telus Samsung Galaxy S III] projeqht:
Update: Saw some reports about Cyanogen fixing Canadian LTE issue in his latest CM10 build! :) Now to wait for AOKP JB to follow suit.

Hey Guys,

So I've been hearing a lot of Canadian LTE Issues on JB Roms such as CM10 and AOKP JB. Although I did have 4G (LTE) on CM10 when I first flashed it, straight from AOKP ICS no data wipe just Cache & Dalvik, my 4G icon disappeared after a couple hours so I thought I was subject to the same issue as all the other Canadians. Not a big deal, JB outweighed having LTE at least for now.

Since AOKP JB was just released last night (Can't thank you guys enough Task + Ktoonsez), I immediately jumped back on AOKP (JB) and happy to report that I do have LTE working on a Canadian carrier (Rogers).

I didn't do anything special, although slightly risky, I'm sure if it works for me it will work for you. Just to be clear, I'll run you guys through my exact steps:

1) I started on CM10.

2) CWM recovered back to AOKP ICS (I did this just to see if my LTE was still working on AOKP, it was.)

3) Did all my pre-Flash setup (Titanium Backup, SMS/Whatsapp backup).

4) Nandroid of course.

5) Clear Cache/Dalvik (I know Task said to do a full Wipe, but I ran into no issues from AOKP ICS -> CM10 without Data wipe, so I took the risk for AOKP ICS -> AOKP JB too, so far no issues.)

6) Flashed AOKP JB (I assume this would work the same for CM10 too.)

7) Flashed JB GAPPS (and then JB Inverted GAPPS :D)

8) Reboot.

That's it really. Im still running amazing on AOKP JB, no issues so thank you Task and Ktoon, you guys do amazing work.

As a final note: I am extremely sorry if you run into any bugs with the JB Roms, a Full Wipe is ALWAYS recommended if you run into unexpected bugs. Also, if you experience boot loops, then that's what the Nandroid is for. Of course most people are running these JB Roms as a Daily Driver, they really are that good. But, keep in mind they are also still considered "Previews" so don't expect 100% functionality.

Plus most importantly, this is just a procedure to get LTE working on JB Roms for Canadian phones, if you run into any other errors then you probably should start clean, you have been warned.. I've only been running AOKP JB for a couple hours now, but I can say I haven't noticed any issues at all yet + LTE with a Rogers phone.

TLDR - How to get LTE working on Jellybean Roms, on Canadian S3 (I747M)

Warning: This Method utilizes a No Data-Wipe Flash, use this at your own risk. But, ATM, this is probably the only way to get LTE on JB for Canadian Carriers/S3s until the Network Preference Setting is implemented.

1) Start from an AOSP ICS ROM where you had LTE working. Recover back or flash an AOSP ICS Rom. (This is important as I don't recommended a Non-Wipe flash from a Non-AOSP Rom to an AOSP Rom, especially ICS -> JB)

2) Make sure you have your LTE APN set for your Canadian carrier.

3) Make sure you set Network Mode: LTE Preferred

4) Nandroid!

5) Wipe Cache

6) Wipe Dalvik Cache

7) Flash AOKP JB or CM10

8) Flash GAPPS

9) Reboot

There you have it, it worked for me and I sincerely hope it works for all of my fellow Canadians as well!

Good luck everyone!