[time-nuts] Striking change in iPhone time accuracy with 8.2

[Paul]

On Wed, Apr 1, 2015 at 12:33 PM, Reid Oda <reid.oda at gmail.com> wrote:

> This seems to imply that the iPhone does get sub-second timing info from
> GPS. Can anyone confirm/deny this?
>

As of iOS N where I believe N == 5 it does the equivalent of calling
ntpdate every few hours if the network is available.  I assume it uses the
mobile system if the network is unavailable and you have a cellular radio
because the devices (can) have a lot of drift.