Do wireless in-building cell phone amplifiers really work?”
There are those that being offered especially in your area for testing. You try it first and if you see it makes better signal, then you decide to purchase. Cellphone signals especially if the building is closed, the eye of the signal can’t reach your phone so that makes your phone gets 2 to 3 bars or quits. There must be holes or portals where signal can get in to your building or house. If that still doesn’t work then test first a signal repeater. you may request it. There are a lot expensive but you try to request two repeaters, an inexpensive and an expensive. You try to compare which is better. You can buy from Nextel. Or a lot from amazon. Please try here: http://www.amazon.com/s/ref=nb_ss_cps?url=search-alias%3Dwireless-aps&field-keywords=signal+amplifiers&x=17&y=27 Sources: IT’S MY OWN OPINION.
A basic system includes an outside antenna to collect the signal from the cell tower, an amplifier to boost the signal, an inside antenna to broadcast the improved signal over the inside of the building or vehicle and cabling to connect the three parts together. A wireless amplifier system will work for you if you can make a cell phone call from where-ever you might put the outside antenna. If you can make a call from outside of your vehicle or from the roof of your house or building, the signal is probably strong enough for the system to help you. The Direct Connection amplifiers must be physically connected to your cell phone or cellular data card with an external antenna adapter. A Direct Connection amplifier does not produce enough gain to drive an inside antenna and give you even a small service range. The 50 dB amplifiers must have at least 40 feet of separation between the inside and outside antennas. The 60 dB amplifiers must have at least 75 feet of separation. Separation is m
