I'm pretty certain that CDMA towers, at least, had exceptionally accurate clocks for something related to the technology (synchronizing the chip code maybe? it'

I'm pretty certain that CDMA towers, at least, had exceptionally accurate clocks for something related to the technology (synchronizing the chip code maybe? it's a guess). Not sure if this applies to GSM as well, but CDMA used to be an acceptable clock source for a Statum 0 clock source.