On my pixel 3a I am able to use GPS, although it is slow to connect. It is my understanding that only gps hardware is used, so it does not get the "head start" provided by approximate location from cell tower settings.

Try this.

-Set "lock when idle" to "never" from system settings/ battery. (I think GPS is shut down when locked)

-Run "sensor status" app from Open Store
-go outside
-Select GPS, mine shows "found supported backend", and "active"
-wait until you get a location. This could be several (10?) minutes, although mine is usually faster.

-Try your map software

Once you verify functionality, you can probably skip a lot of this.

Yes, I had similar distortion with the speaker phone mic. Pixel 3a UB Version 410.

@rdl85 I am able to connect to my BMW i3 bluetooth and make and receive calls with a Pixel 3a running UT Version 400 (dev). Good sound and microphone performance. This is a big improvement from my old Nexus 5, which had extreme distortion in hands free calls.

Just to add a data point. I have been using a Nexus 5 on T-mobile (US) for about a year an a half, with pretty good functionality.
I am switching over to a Pixel 3a, and am currently running UT version 400 (dev channel).

Immediately after install phone calls worked in both directions, but Text/MMS could send but not receive. After fiddling with APN settings I discovered that disabling 4G (setting 2G/3G connection type) allowed for text and calls in both directions.

I have also observed the APN setting issues mentioned by others. Existing APN entries can be edited, but new ones can not be saved.

In general the port is coming along very well, and I look forward to a work around for MMS in 4G

Thanks to all who contribute!

@hentaixp
I am also just moving to the Pixel 3a after about a year and a half with a Nexus 5 on UB Ports. I can confirm that automatic brightness does not appear to work on my phone.