Alerts you with a voice message-"NO NETWORK", if the phone goes out of your cellular phone network.
Works only on SIM 1. Flow stops itself when flight(airplane) mode is turned on.
Useful for those whose phone is frequently not reachable (example:A room in the basement may not be reachable). They will at least know that they are not reachable and can try to keep phone in a good network place.
Please disable logging as the file may grow large.
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