Also, but not mentioned in the article....
If the user was "roaming" the traffic goes back to the home network, as does the check to allow roaming, voice access, etc etc and SMS.. so as O2 was not suffering "no signal" that would help in zero way.
Also, but not mentioned in the article....
If the user was "roaming" the traffic goes back to the home network, as does the check to allow roaming, voice access, etc etc and SMS.. so as O2 was not suffering "no signal" that would help in zero way.