I was in one of the cell network provider's testing lab a few times. They also do things like RF testing before putting the device on sale, but their lab doesn'

I was in one of the cell network provider's testing lab a few times. They also do things like RF testing before putting the device on sale, but their lab doesn't look any similar to that. They have a bunch of Faraday cages (think of labs with sheet metal walls) and lots of RF emulation equipment - phone's getting connected through the RF port on the back; RF emulators take care of simulating any bad RF conditions that you could possibly imagine. So, their labs don't look that fancy at all. Still they manage to have devices that could be held any way you want.