PPP Link error resolution when you connect to mobile Internet
START > CONTROL PANEL
PHONE AND MODEM OPTION >> MODEMS
SELECT MTK GPRS MODEM >> PROPERTIES
GENERAL >> CHANGE SETTINGS
ADVANCED TAB >> EXTRA INITIALIZATION COMMMANDS
IN CASE DOCOMO
AT+CGDCONT=1,"IP","TATA.DOCOMO.INTERNET","",0,0
IN CASE Airtel
AT+CGDCONT=1,"IP","airtelgprs.com"<cr>