i can use internet if i use default browser nokia 5300, but if i use opera mini, yahoo go, and other software need to connect internet, all of them doesn't work!!!
please help me

your problem doesn't seem to be with your phone device.. rather it will probably be your network connection. you need to subscribe to GPRS to have internet on ur mobile. subscription procedure may vary depending on what service provider you use, and your location. generally, we request GPRS from provider through text message, and they sent us the settings which we save in our phone.. then according to the internet plan we choose, we pay and use. hope this helps..