I came across these things when I googled for increasing 3G speeds.
This can benefit you of getting 3g speeds on 2g, like me.just you need to switch to 'wcdma only' mode.
Follow ahead :
1) download this software called 3g/4g speed optimizer from market
From Play store OR Here is Premium version for Free
2) Download this script manager
From play Store OR From HERE
3) Download the 3G turbcharger script by zeppelinrox
3G turbocharger script
you might want to compare the speed differences after and then of this tweak. If you, then download the NQ mobile security app from here "NQ MOBILE SECURITY .APk"
and it should give you a small network meter which shows current network speed. download it, start it, and then download something from the play store to see how much speed you are getting. Its going to get increased soon anyway.
Now Follow ahead
Start 3g/4g speed optimizer
-choose network speed as 12/28/7-max speed
-check on down speed increase
-now click on apply tweak.
!!!RESTART YOUR DEVICE!!!
Now open script manager
-browse to the downloaded 3g turbocharger text file
-check on superuser icon
(N00BS: the android skeleton icon)
-click on run. script will load. wait till it asks to make a selection...
-scroll up and see what setting you need. fast, faster or fastest. I would recommend fastest
. enter the option number.
-again enter the option to reboot.
After reboot, your 3G speeds should be increased
To check your speeds, again download something from play store, something bigger than 2-3 megabytes would be preferable as it lets you see how far the speeds can get.
NOTE 2: this may not work for everyone, if it doesn't for you, dont blame me, you probably are already getting the max speed from your network operator.
Also I would again like to mention that indian users will be mostly benefited with this tweak. Enjoy, and dont forget to press the "THANKS" button if it works for you.