I want to transfer PC to PC data using my two nokia 3310 mobiles.

I have connecting cables and I have developed an application to send sms for PC to PC using these mobiles.

Please suggest me how can I do my new purpose. I heard about AT command set. But I do not know how it works or I have to be sure about the right way(mobile model,software, tools etc) in which I can transfer data.

thanks in advance,