Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
From where is the time information updated when the option Date & time settings -> Automatic - Use network-provided values is selected?
Date & time settings -> Automatic - Use network-provided values
Is it from GSM, WiFi, GPS or anything else?
I believe it is from GSM, but I'd like to get a confirmation.
Thanks to t0mm13m's comments:
The keyword is NITZ - that is where it comes from.
Certain ROMs fail to handle it, others do. If it fails, can always fallback on a NTP app like ClockSync (this requires root BTW) :)
Required, but never shown