First go to menu(for nokia) then go to--settings-configaration-personal configaration setting.

Select web and give these--- account name-TATA DOCOMO INTERNET. Username-blank. Password-blank. Use preffered access point-no. Access point setting...... Proxy-disable. Data bearer-packet data/gprs. Bearer setting---access point-TATA.DOCOMO.INTERNET .authention type-ipv4. Conection type-normal. Username-blank. Password-blank.