2G (Voice) , 3G (Data)

[sharpbug]

My phone is jailbroken and @ 4.1 (iphone 4)

Is there a app (or a method) , to use 2G service while we're making calls , but 3G when we open an app that needs data.

Auto 3G shuts down 3G but only when going into sleep mode. Using 2G or 3G doesnt matter to me when it comes to talking but consumes more than talking on 2G network ..

But while surfing , 3G is a must ... It is a easy programme to develop i think , there's any ?

And also , is there an app that shows both front and rear cameras at the same time (either Picture in picture , or split screen etc.)

[phatcamaro]

Unless I'm missing something just download sbsettings. There's already a 3g toggle that comes with it.

[sharpbug]

there is . but everytime i manually activate before data communications and disable before voice calls .. i want it to be done automatically