T-Mo US OS

No 4.3 remember it was bypassed and re-introduced as OS 4.5. All carriers should have it certified by September.

Also on another note you do not need to use your OWN carriers OS you can use anyone else's and just delete the vendor.xml file.
 
~via BB (wap.rabroad.com)~tmobile seems to always been the last up to upgrade their os, oh well, it doesn't really bother me since we are capable of installing os from other carriers.
 
No US carrier has released 4.5 yet for any device. All you can get is 4.3 on devices released in the last 6 months or so like the 8120, 8130, 8330. Any device released since about Jan should have 4.3. Any device released before that most likely has 4.2.

And like everyone said, just download one of the 80 million (un)released betas or one of the few officially released 4.5 OS's. Just delete the vedor file and have fun. Just don't put any 4.5.0.37 on your TMO device cause it will kill the sim repeatedly.
 
~via BB (wap.rabroad.com)~
Yeah, don't get 4.5.0.37. I was lucky, being one of the first to use it. It didn't fry my tmobile sim, don't take the chance.
 
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