Next message: Craig: "Re: Cell phone time"
Mike-
<If anyone has feedback as to how cell phone time is determined I would be
interested!>
A US-centric answer:
If you are using a CDMA cell phone, the exact time is required in order for
the CDMA system to do the internal work of chopping the calls up and
reassembling them at the cell tower. So, that system broadcasts time to all
the phones, which are simply showing "system time" that comes from various
sources like GPS receivers at the towers.
IOW, you're getting GPS time or something similar.
Users of TDMA and analog phones do *not* get anything similar.
With a GSM or GSM/GPRS phone, I'm not sure what you get because there are
different implementations. But I think most of them also are displaying
"system time" even though some of the new phones have built-in clocks and
alarms to use when they are off the system.
