To Get Data from Mobile For Microcontroller

Hello everybody

i m a student of electronics Engineering. i m going to make a project .
i have designed a project which gets the data through a temprature sensor & then sends it to the microcontroller. The microcontrollerAT80c51 cheks the data & then if data (temprature ) is more then some defined value then it sends an SMS through a mobile connected to the microcontroller to some other mobile & software is written in ASSEMBLY language & to access the mobilel , i m using AT commands

now for module 2 i wished to chek the mobile inbox wheather there is an sms from some specific number & if there is an sms in the inbox of mobile inbox, then wish to send a signal to the microcontroller AT80C51 so that it can generate a pulse or in other words can set an out put pin to drive a relay or some switching device , i need the assembly program help & also abt the circiutry to be arranged.
plz help me out.
take care
looking for ur reply , plz also reply at thenewton@hotmail.com

regards
Hafeez Ur Rehman
pakistan
00923217091514