Many customers have been pleasantly surprised to receive 3G MicroCell units from AT&T recently. The device usually costs about $150 and goes some way to helping users address some network connectivity issues in certain areas. AT&T has apparently stated that the reason for giving away these devices is that it’s running trials in two markets in order to determine the most effective way to market the product. Specific regions weren’t mentioned, but one of the locations is known to be in Scottsdale, Arizona. Aside from that, speculation is that AT&T may be doing it as a move to help retain iPhone subscribers before the possible appearance of a Verizon iPhone, which has long be rumored. Regardless of AT&T’s reason behind it, if users are getting free 3G MicroCell units, there isn’t too much to complain about.