AT&T began selling the MicroCell Monday, a femtocell device aimed at boosting voice and
3G data signals indoors. The MicroCell is essentially a miniature cell phone
tower that uses the customer's home Internet connection to connect to AT&T's network. The device can support up to four voice or data users at once, and subscribers can
switch between the MicroCell and AT&T's regular network without interrupting the call....
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