gsm. How to simulate a weak BS signal. (techies on vacation topic)?

Question

mobile connection

If techies go on vacation, then how to make it difficult to text or call a mobile phone?
Special screens? Cellar?
And how to make it difficult to receive SMS on Android?
Or is the signal out of range?
There, after all, they distinguish that the smartphone is turned off?
And you just need to be in the worst reception zone ..

Answer 1

In the settings of the emulator, in any case, what comes with the studio, there is a choice of signal strength, network type, and its status.
And on a real device, wrap it with foil (this is not a joke)