http://www.dx.com/p/gsm-2-7-lcd-wire...5#.VXvYHKNMHFo

I picked up a wireless gsm kit from dx.com once you get past the engrish its pretty straightforward. I live in an apartment so the wireless was necessary though id rather have wired. FOB to arm and disarm so I hid the unit in my place. 2 motions 2 door sensors is all I need to cover all the entry points. Ill likely be adding anonther motion to have redundancy on the front door. It came with enough sensors to do my place 3x

Got a prepaid sim card from alarmsim.com thay was kind of a hassle. Shit customer service. But its got no monthly fee and is an unlocked Verizon card. Since I have Verizon its real easy to check signal strength