addon needed to repairshop2 php mysql

hello people now this is probly going to be hard and i dont even know if its possible but here goes i have just bought repairshop2 php application which is amazing this is the procedure of taken in a repair 1 take customers name and mobile number 2 take note of the problems and so on now when you start work on a certain job you click the job and there is a button which changes the job from just recieved to working on job and then when its complete you the press the button to that says complete then this changes the status to job completed. demo site is at [login to view URL];software=1 -------------------------------------------------- ok so my addon i need is when i change the status of the job like when i click start working on job i would like for the software to automaticly send a sms text to the customers mobile number which was given when the job came in saying eg ( your job is now being worked on) then when the job is complete, when i change the status to complete then text them a message saying ( your job is now repaired and ready to be collected) is this possible if so let me know how much thanks