I got notified that my post
This was probably because I previously posted the same (actually, more detailed) content here.
I know one shouldn’t cross-post the same contents in different topics, but I think the title “Medkit restore (4 leds) on Omnia hangs” of the 2nd instance is more likely to attract the attention of people having the same problem than the first “Unable to update list of packages!”.
I’d be happy to move my post from the first to the 2nd, but I think there should definitely something be in the 2nd one (or, even better in the instructions themselves as suggested in the 1st post) or others will have to search around to re-find what I did.
Thanks for your time!