Sometimes, when you call a mobile phone, you can hear in response the phrase "The subscriber is temporarily unavailable" or "The subscriber's phone is temporarily unavailable." What are the reasons for this?
The message about the "temporary unavailability" of the number of any cellular operator in most cases means that the phone is currently located in a place where cellular communication is unavailable, or in a zone of so-called unreliable reception. In a city, it can be a subway train; basements or underground passages; specially shielded zones (some concert and theater halls, for example, are specially equipped so that calls during the performance are technically impossible). Outside the city, far from settlements (including suburban settlements), there are also places where the signal can be very weak and sometimes disappear. Aircraft passengers are also “temporarily unavailable”.
If the phone you are calling is discharged and turned off spontaneously, you will also hear that "the subscriber is temporarily unavailable." This is considered an "improper shutdown of the device". All other cases of device breakdown as a result of falling on asphalt, into water and so on fall under this definition.
For some operators, the message about the unavailability of the subscriber can be heard even if the owner of the phone turned it off with his own hand. But most often in such cases, the answering machine says “The subscriber has disconnected the phone” or “The subscriber's device is turned off or is out of the network coverage area” (the last message can also be heard if the phone, as in the case of “temporary unavailability”, is in the with an uncertain reception).
Another reason why you can hear about the "temporary unavailability" of a telephone number is a SIM card taken out of the device. This happens when the phone is stolen, or when the owner of the phone, for example, went on a business trip to another city and changed his SIM card to a local one.
And the last reason why you can hear an autoinformer informing that the subscriber is temporarily unavailable is the congestion of communication lines. This can happen on holidays (for example, on New Year's Eve, when, after the twelfth strike of the clock, everyone starts calling each other with congratulations), in places where large-scale public events are held, or in areas where there are large traffic jams.
The best thing that can be done in a situation when you cannot get through to an “inaccessible” interlocutor is to call back later, in the hope that the subscriber has returned to the zone of reliable signal reception.
