Originally Posted by gripfly
I don't know but I would not do it. Why you don't flash the 10.3.1.A.2.67?
It's on that. Because I need AWS. I've flashed the baseband from the 6606, it causes instability, but that's all. - the phone posts. People have flashed in the other direction and they're fine c6603 -> c6606
The hardware in both devices is (almost) exactly the same according to teardowns. They have the same qualcomm MDM chip, however, they contain (perhaps) differing signal amplifier circuts, as far as we can tell. (nobody has done a teardown of both devices exactly, as far as I can see.)
Get this. The Baseband of the 6506 works PERFECTLY in the 6603. No issues, no hiccups, no nothing, and it allows me to use LTE via 2600mhz on two carriers.
Nobody has tried this. With a locked bootloader, I should be fine, but it's still a little freaky. Any ideas?