I am developing GSM Based low price security system which has required following functionalities.

1. Dial No
2. Send Sms
3. Read Sms

I want to serial interface between Micro Controller and Mobile handset.

Above Functionalists are implemented by two method.

Method :1

1. Micro Controller send above command to phone by serial interface.


OR

Method :2
I will build application which can run on mobile and

1. Application run on mobile
2. Application can Accept and send data to serial port
3. Application can send and receive sms
4. Application can Dial No.


Kindly suggest me low price phone which can support Method1 or Method 2 .