T300 firmware upgrade?

[jrsmooth]

I am sorry if this is a repost. I have a Sony Ericsson T300 with T-Mobile, service was great before I move. Now I moved into Upper Darby (19082), PA, I live at 3rd floor, and I have NO signal.

By using the hidden manu, I was able to find the software information as follow:

SW information
R1C001
prgCXC125636


Now my questions are:

1. What is the latest SW version for this phone?
2. Will upgrading my SW version improve the receiption?
3. Where should I look when I wanted to have my phone's SW upgraded?

Thank you very much for your help.

[GrafxDesignGuy]

I dont think there is a newer firmware for the T300, you just might be out of luck and be in an area where there is no service, T-mobile just put up an attenae somewhere near my house and i now have 4 bars, before there was nothing... did you try another TMobile phone? Possibly a friends or sumthing... check if they get signal.