i'm looking for a cell booster but looking around, theres a lot of them around. I'm looking for one that can work with all cells (on all freqs), and from what i can tell, if the extentions don't fit, you can order adapters from like cellantenna.com or alternativewireless.com. I was wondering if anyone had any idea about these boosters, if they really work? any info would help. thanx.