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Re: Wanted - a Debian handheld





Am 10.11.2017 um 15:24 schrieb Darac Marjal:


The easiest solution is to not fit a SIM card, however, be aware that in some countries limited cellular access may be possible even without a SIM card (for example, in some countries you can call emergency services from a phone with no SIM card; in some you do need a SIM card even if it is out-of-range, blocked or not activated).

Its in fact part of the spec.

Part of the GSM authentication and network attach spec allows any device w/o a SIM, or without a valid SIM, to attach to the network, and will accept emergency calls.

E.g. If you have a T-Mobile phone, and occasionally see it in SOS mode, what's happened is that the phone can't see a T-Mobile tower, and connects to an AT&T tower instead. There's no roaming agreement, so AT&T won't let the device onto the network, but will accept SOS calls.