So I'm upgrading the security in my shop and maybe other things soon after but the shop comes first. I am looking at GSM alarms so they will call or txt me if something happens. I want to know more about the SIM card. In Canada here it seems the cell companies are ASSHOLES! We can get prepaid sim cards for a pay as you go plan but we have to pay $10 a month min to keep them active. I am wondering about using a US sim card. I have not ordered the alarm yet but want to very soon. I have been planing this for a while. And now its time. Other wise one other option is a very powerful signal that will send a message from my shop to my house which measures 1.9km on my e-bike so ~1.5km..... The gsm is best so I can get messages no matter where I am. Any help for a pour Canadian would be awesome.