Your best bet when shopping for a signal-boosting system may be the Internet. It's unusual for cell phone stores to carry this equipment, and choices at electronics stores often are limited. Matt Larson, of wpsantennas.com, suggests working with a seller that has a liberal return policy, because it's difficult to know how well a system will work until you try it. Among the manufacturers to consider are:

CELLPHONE-MATE

www.cellphone-mate.com

CellPhone-Mate manufactures both mobile and home/office cell phone signal-boosting equipment at prices ranging from $149.99 to $369.99 for complete kits. The new 3W CM2000-WL 40dB V3.0 mobile kit also can be used indoors. It has a suggested retail price of $279.99.

Wi-EX

www.wi-ex.com

The zBoost Dual-Band YX510 home/office system from Wi-Ex rebroadcasts cell phone signals indoors, providing up to 2,500 sq. ft. of coverage. An optional antenna increases coverage to up to 10,000 sq. ft. The list price, which includes an external antenna and an amplifier with integral indoor antenna, is $399.99. The company also manufactures other systems for mobile and home/office use.

WILSON ELECTRONICS

www.wilsonelectronics.com

Wilson Electronics manufactures a broad range of mobile and home/office cell phone signal-boosting equipment. The Dual Band Mobile Wireless Amplifier offers 3W of power with a suggested retail price of $389.95. Other system components are extra. The company's Mini-Mobile Dual Band Mobile Wireless system, which includes the amplifier, antenna and other components, offers 1.5W of power and retails for $374.95.