k790i gprs

hi i am using k790i r8bf003 my phone was working fine bt dont knw when and what happened to my phone:( prob i am facing is that its gprs disconnects suddenly while using and it also takes long time to connect when gprs is connected it dont works fyn:( i have flashed my phone alot of times i dont remember the count even can any one help

Maybe something wrong in Internet Settings. It would be better, if you check them. If there is no problem, Then check that GPRS connection aviable on other phone.