Originally Posted by Vladislav Jaden
This symbol shows that GPRS is attached. You can detach GPRS if you don't use GPRS very often. This will increase you mobile battery life up to 20% more and will also remove the small blue background G on your mobile screen. To detach the GPRS, slide your phone up and enter this code: *#4777*8665# This will appear on the screen like this: *#4777*—– . Then, a secret menu will appear on your screen. Go to the option GPRS Detach and click it. Next you will have to wait some time, about 3-4 seconds and get the message: GPRS Detach confirm.
Then how do you re-attach it?
This sounds like it would do more harm than good. Even if you don't use GPRS hardly ever, it's usually always there to bounce back on- you can still send/receive email, send MMS and even browse the internet (although it will be v.slow)