Weak 3G signal

Feb 29, 2012
I have a problem with my MI2S - it has really shitty signal when comes to 3g - it drops to 1 bar and then it changes at once to Edge. It is really annoying because my other phone on the same network is doing way way better. is it possible to tweak somehow radio drivers to have better reception when comes to 3g networks?
I think it is due lack of HSPA 900 support - is it "doable" to add it support by software or not?