hi anish have a look at these

[dagakshay]

hi anish 

have a look at these links it migh be helpfull for you

 

http://www.engineersgarage.com/embedded/avr-microcontroller-projects/gps-interface-circuit

http://www.engineersgarage.com/articles/gsm-gprs-modules

http://www.engineersgarage.com/microcontroller/8051projects/gsm-interface-8051-microcontroller-circuit-code

http://www.engineersgarage.com/forums/8051/how-interface-cellphone-micro-controller