7/11/21 I returned to the store because it didn't have the results I wanted. Luckily, I got my money back. Be careful and ask if you want to buy such devices because most of them are not accepted for returns.
Based on the features, I expected much better coverage.
It was installed in an 80 sqm house where there is an issue with the mobile signal. It only boosted the signal in the room where the amplifier was installed. In the other rooms, the signal is not boosted at all. It's as if it has no power.
The truth is, I expected better results based on its features. I don't know if it covers 500 sqm in an open space as mentioned in its features, but in an 80 sqm house, it doesn't even cover 20 sqm.