I found out that its not the OS in the phone that is limiting the Reception, for some reason its Tmobile network itself. I put my at&t on the 8900 and i had solid 5 bars every single time i looked at it and amazingly the battery ran for 4 days straight with 1st day of moderate use and the 3 days of heavy use. I did a little research online and that's everyone's problem with 8900 and T-Mobile.
Edit: By the way I am running .206