I use a LineageOS phone as my daily-driver but I still keep my UT phone when I found out another major update occurs. I believe UT will get much better in the future.

One last thing, aside from issues with Signal on UT, were you able to install any non-openstore apps?

I just read a post on UBports with instructions of how to install Android apps from Waydroid and desktop apps from the stock app Libertine. In order for apk apps to work, I've read F-Droid works and so should Aurora (front end for google play store apps) if you need to install more apps. You could download Signal from Aurora and see if it works.

I got Tello on the Pixel 3a XL too. Calls, text and data work. I can even make a call on the Tello app in Waydroid.

For some reason, if I put the cellular connection type setting 2G/3G/4G, it takes about 20 seconds or so to make a dial tone, whereas the 2G setting seems to be a little bit faster. Of course, 2G data speeds are so slow the internet doesn't show up so I just use the 4G sysem setting. This dial tone delay is not the case using the Tello app since you can call on it too, and it calls right away.

@capsia Thank you for the clarity

I just installed the app. I'll check it out.