I have a similar problem and need urgent help.

I cannot update my Jolla from 1.0.2.5 to 1.0.7.16. Update downloads well and install looks very solid until phone goes off when update is about to reach 100%. After that I'm unable to boot the device at all. I tried Recovery with option 5, but still nothing.

Recovery + option 1 works, though I still can't update the software to 1.0.7.16.

I don't have any openrepos or stuff on phone. Only tried installing Google Play.