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"Some handsets can't be fully powered down without removing the battery; for instance, some Nokia models will wake up when turned off if an alarm is set." (http
by happypatrik 13y ago
"Some handsets can't be fully powered down without removing the battery; for instance, some Nokia models will wake up when turned off if an alarm is set." (http://news.cnet.com/2100-1029-6140191.html http://news.cnet.com/2100-1029-6140191.html) I'm guessing that there even might be models with built in battery backup for this kind of functionality.
- cinquemb 13y agoAnd with that: Cellular devices are designed to transmit some kind of pilot signal even when turned off but with operational battery http://www.endoacustica.com/gsm_interceptor_en.htm http://www.endoacustica.com/gsm_interceptor_en.htm