Does anyone know where I can download the 4.1.1 or 4.3 updates to this phone. The brand number has to be I9305BVBMF1. Iv looked all over the internet and cant find them any where.
The brand number does not have to match, what does have to match is the phone provider (as some may run on ARM and others x86).
I can only find it for the UK and Ireland GSM version of the phone. Did you import the phone as i never knew the LTE version was sold here in the UK. No one looks to have captured the OTA update for the LTE version and posted it on XDA yet. You can however flash many 4.3 roms with the Touch Wiz interface from Xda, or even 4.4 roms based on stock Android: [INDEX] Samsung Galaxy S3 LTE - ROMs, Kernels, MODs, Recoveries, Themes [02 Dec 2014] - xda-developers
My phones updated to 4.3. I want to download 4.4 custom. Does anyone know where I can download the rom and CWM recovery to use in odin.
Look on XDA in the section which matches your phone: Samsung Galaxy S III I9300, I9305 - xda-developers I'm presuming you have the Galaxy S III I9305 (4G LTE + 2GB RAM)? They are guides on how to unlock, flash a custom recovery and rom if so. It looks like you have a few 4.4 roms.
Looks a good 4.4 rom from what people say: [ROM][22/12/13]SentinelROM v6.00-CM11 Source-Fast, Stable, Battery[GPL] - xda-developers