"Bought a system at the end of September, i've sent several emails but no response, bought a Simon Xti system with GSM, but the GSM wont connect despite showing a good signal, guess i have an alarm that goes off now, but cant get it monitored, disappointed after all the good reviews for home security store. I haven't called yet, but rarely have time in the day, should be easier to get a response via email at their convenience you would expect anyhow. The SIM that came with the module was locked with a pin code, dunno why (unlocked it with PUK code from t-mob), Tried Interlogix support but they wont help an end user but did say they dont have pin codes on their modules?( kinda disappointed with that too, why buy their product? Probably typical though) alarmrelay.com tried to help me get it going and even had alarm.com support on the line but they said the gsm or panel was probably defective."