Help in SMS controller

you forgot to add 0 at the end for CMD2

well your code is fine.. just give some delay between each command you send..
but dont give delay in response and command

now after cmd2, you need to read the modem response and keep storing in buffer.. or some memory area. keep in mind that modem sends a lot of data after sending CMGR command. so you need to break the data in wanted one and unwanted one.. see the SMS controller how data is managed, same way you do in your code..