Now in these days the technology is so increased that you have no need to use external antennas. An internal antenna can do the work just as fine as an external antenna does. So you have no need to buy a old cheap model of cell phone. It
means you are in a need of cell phone booster for home and office. According to me an internal antenna is so much better than an external antenna. An external antenna can be easily broken. Most of the cell phone manufacturers use an internal antenna. For example, Samsung and LG phones all are using external antennas but Motorola is using internal antennas. Also Nokia and Sony phones all have internal antennas. Sound and voice quality partly depends on mobile phone’s brand. But they can be removed with the use of a cell phone signal booster. Other manufacturer is IMHO. It provides the antennas which will surely give their better performance. If you use a television antenna to strengthen the cell phone signals, then it will not boost the signals. Only a cell phone repeater can do a better work in this field. So purchase these cell phone signal booster according to your need from a nearest dealer.