As a result, the iPhone 14 Pro Max and the iPhone 14 Pro of those who wanted to test the beta suffered lock-in problems, slow location tracking, and random inaccuracies. It seems that all those must have been software interface glitches, rather than hardware problems, as Apple issued a fix in the iOS 16.1 beta 2.
Instead of downgrading to the iOS 16.0.1, those who installed the 16.1 beta can simply update to the second beta and have their L1/L5 band GPS issues taken care of.
The oldest, L1 band is ubiquitous but situated on a slow 1575.42 MHz frequency, while the newest L5 on 1176 MHz is fast and with bunker-busting reach, suitable for critical commercial applications like in the aviation industry.
L5 is still not as widespread and it is commendable that Apple is providing it on its Pro models this year, even though high-end Android phones have been brandishing the dual-frequency GPS support for years.