Recently bought a P20 for my wife and just let her use it like normal.

On one fine day, my wife got lost and needed to use Google Maps, which was not working.

As she got back home, I have checked, the phone won't lock to the GPS at all, even didn't see any gps satellite from the GPS Locker app.

It seems at least in this LYN thread, almost no people reported about GPS issue

But in FB and Google, lots of people are complaining about GPS issue.

Some got it fixed by sending for repair, some just uninstall reinstall Google Play Services and lots more.

Except sending for repair, I have tried almost all suggested solutions on the net.

So the question is, should I send for a repair?

might be a faulty unit then, or some update might messed up the phone too (based on forum/group).
well I will monitor it first for few weeks and see. If nothing changes, will send for warranty claim then.