Not sure what I can trust from Google search on this topic, has anyone done some real world testing of minimum signal level required for SMS data transfer?
I tried using MD Faraday bag tester application on an Android.
Normal signal level at test location -112dbm
Inside Faraday bag -127dbm
Inside one layer of foil -127dbm
Inside two layers of foil -127dbm
Inside two layers of foil and Faraday bag -127dbm
So I'm speculating the software has a -127dbm limit
Obviously varies from phone to phone, but roughly where is the cut-off point for no data?
Thanks in advance to all that respond.