Emergency calls ignore roaming settings and usually connect without checking subscription, no? Unless the SIM is so invalid the towers reject it explicitly. Or the phone is old and invalid, which is fucked up but a thing that’s possible.
Almost forgot that the US doesn’t have plain GSM anymore though, so there’s that.
Emergency calls will go to your own carrier first, but if you have no SIM your phone will attempt to connect to any available carrier arbitrarily which offers emergency services and that carrier will accept the emergency call
That’s why faking your own carrier with your own basestation and using a custom SIM to make your phone use it would prevent real emergency calls. (beware, doing it to others’ phones is very illegal)
Emergency calls ignore roaming settings and usually connect without checking subscription, no? Unless the SIM is so invalid the towers reject it explicitly. Or the phone is old and invalid, which is fucked up but a thing that’s possible.
Almost forgot that the US doesn’t have plain GSM anymore though, so there’s that.
Emergency calls will go to your own carrier first, but if you have no SIM your phone will attempt to connect to any available carrier arbitrarily which offers emergency services and that carrier will accept the emergency call
That’s why faking your own carrier with your own basestation and using a custom SIM to make your phone use it would prevent real emergency calls. (beware, doing it to others’ phones is very illegal)