StevenR
I know I discussed the problem in two different places, so maybe this is NOT the thread where I pointed out that the battery was most likely very low at the time. No oscillator can run worth beans without power. The reason desktop computers seem to be able to keep time even when off and even unplugged, is that that oscillator has its own battery (good for many years). No cellphone I am aware of has a separate battery for the clock.