@linusthewise
Yes, your right. Our devices behaviour is very different. But you said that you hav a dual-SIM device (F8132). My device is a single-SIM device (F8131). I would think installation procedure is the same on both devices...
With the UT installation on my device it was important to do following both things before starting the UT-installer:
I have no idea how to solve the issues as I'm not a developer. And I hope some Dora-UT-developer reads our posts and could help to get the phones working and solve these important issues.