I have installed an alarm system in my house. The alarm has a standard phone connector that you could plug into a phone jack - It allows the alarm to call you and tell your house is being robbed

The problem is I do not have a land line at home... I was wondering if there was a cellphone type device I could buy to use as the phone connection - it would have to have a standard jack built into it and I would prefer to be able to put in a cheap sim card - as I hope this thing will not make many calls?

Have never seen a cellphone with a phone jack (RJ11/12)

I would talk with the company that installed your alarm and see what they have to offer since I doubt if you are going to be able to rig up anything yourself

EDIT: just noticed that you installed it yourself, in that case talk to whomever you bought the parts from and maybe they can help