How many phones connected to signal booster at the same time?
How many cell phones can cell phone booster handle at a time? Most wireless signal boosters for cellular support multiple simultaneous connections across multiple carriers. Although the number of simultaneous connections supported by a booster has no limit, there's a theoretical limit. This is determined by the strength of the cell signal outside of the building. The stronger the signal outside the building, the more simultaneous connections will be possible.
A second factor that impacts number of cell phones supported by a particular cell phone signal booster is its amplification power. For example, a 72 dB Gain Signal Booster will support more users and devices than a 65 dB Gain Signal Booster because the previous booster kit will amplify available signals more than the latter booster kit.
Therefore, there isn't a specific number of phone users and their devices that can receive signal boost from a particular signal booster kit. If you see specific number or are told a specific number by anyone, it is only a very rough estimate that cannot be corroborated as a stated fact in any signal amplifier's product specification sheet.
Can you have two cell phone boosters in same building?
Absolutely, greater the number of cellular amplifier kits installed, the more the density of coverage signals inside building. Some specifically target one cell boosting system's exterior directional antenna to a particular cell carriers tower and install the second system to target its outside directional antenna to another Carrier's cell tower to get best reception for both carriers. This can also be done using one system by adding a diplexer. It can also be done more effectively using a multi-tower cell signal booster system.