Just use it when needed in other situations keep on 2G (EDGE) is enough for notifications/chat/email even simple web browsing :P
Switch to 3G only when u relly need it.
No u cant fix that by your own.
PecanCM have to fix that in next beta hopefully.
SKernel is here :P > http://forum.xda-developers.com/opti...ernel-t2858045