You must have missed this post in another thread.....
One trick i learned when installing them is to find out how the client orients themself while on the phone and make sure the up-side of the device is pointing directly up.
In the example below the booster would be installed upside down so that its right side up while being used by the client.
In this example it would be installed upright.
In this example it would be installed on an angle.
And finally.. for active clients i suggest installing several all positioned differently so that signal can be boosted at any angle.