Mobile phone signal booster in the apartment and buildings

It is probable that you do not just notice an interesting, but not too pleasant regularity - in modern buildings the use of mobile devices is almost impossible. Concrete, reflecting the signal and preventing its spread, contribute to the emergence of "dead zones". Perhaps a signal to the apartment and will be present, but a weak and unstable. On the one hand, formally everything works - you can send and receive messages, call and talk. But the quality of communication is suffering - failures, interference, poor audibility interfere with the normal full communication over the phone. However, do not sin only materials used for modern construction. In the brick and wooden buildings communication quality can also be quite unimportant.