What is the option for cell phone activation of the system

I have just started using a Simon 3 and it works fine with my cell phone. I call and let it ring twice. Then I wait 10 seconds (plus a few) and call back within 40 seconds. The system responds and I hit * pluse my code then the number for what I want. No real problems, just get used to the timing with the cell phone. Make sure it rings twice (only) the first time and call back between 10 and 40 seconds.

Sorry. There is no option for cell phones. The unit requires what little voltage that comes over the red & green wires to use it. (It's the voltage that makes your normal phone ring before you pick it up, otherwise there is no voltage in a phone line). So without a regular phone line, it's not going to do what you want.