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If you set the time zone correctly, and set to get time from GPS rather than network, my time is 1 hour fast.

if you use an app (such as GPS status) to see the UTC time from the GPS system directly you see that the UTC time is one hour fast.

This is causing me a lot of problems because I use several tracking apps to record my position and time for hang gliding competitions. These all use UTC time.
To be clear - this is nothing to do with time zones, or daylight saving. It is an error in the globally fixed UTC time read from the GPS satellites.

But these were working well before the update from android 6.0

Please advise if there is a fix, or if I should revert to android 6.
Because this phone has pressure sensor, and both satellite position systems and is rugged I recommended this phone to many friends, but I advised them to avoid the android 7 update for now (looks like i am the only one to update so far).

If you would like, you can return back to Android 6.0, here is the link: http://www.needrom.com/download/blackview-bv6000-4/
If you are using Win10, you may have some problem to install this, please follow the below steps:
1. Connect your phone to PC's USB
2. Open folder C:\Windows\inf
3. Right-click the file wpdmtp.inf
4. Select ""Install"""

I don't have such an issue with Android 7 ROM 20161216.

BV6000_blackview_V01_20161216
Phil, is this exactly what you have on your phone? if so then I will first try a factory reset on android 7.

Hmmm. My gps time (gps status utc time or android settings with gps time data) is an hour slow. Running Android 7 with 20161216.

Good news (sort of)
Factory reset cured the issue (without reverting Android version). UTC time is now correct (one hour behind my local London time as we are 1 hour ahead in summer).

Thank you for your feedback. Nice to hear that it's solved!