Hmm.. we here's my (current) story on this latest "update".
I'm in the UK, on EE (4G) - and my CURRENT / previous O/S release was a (fairly stable..) 10.1.0.2312
I received an eager notification on my Z10 advising me that this update (10.1.0.4181) was available to download - so naturally I thought nothing of this (in terms of how this might screw things up..) - so I clicked "Update" - and off we go.
Except that it failed. Big time.
First time of asking all seemed fine - until the BB loading symbol appeared to get stuck on a tantalising "99%".
I left it for (at least..) 4 hours - the update had been over WiFi - but the download part was swift and fine. Yet post reboot I could only hit 99%.
So.. I did some Googling - and found a tip recommending the removal of my SIM - and to then try booting again. HURRAH! - It worked. An apparent fine reboot - and working. Including (and vitally) the same after I removed the battery again, re-inserted my SIM and booted up (fine).
BUT.. I then check the System Settings and find that I am STILL ON 10.1.0.2312 !! (so the update failed).
Oh, and yeah - ALL of my text messages ... GONE.
As it stands now (5 days on) I have tried the update several times - only to have the same issue. I did on one occasion get to 100% - but the phone still froze (and seriously... surely 4 HOURS on 100% is enough to leave it - phone felt very warm too...)
As one final attempt (before marching to my EE store and complaining (not that this appears to be their fault!) - I am now trying the update via the eternally unreliable (and crash-prone) "Link".
I am not expecting it to work.. but I will keep you all updated. Anyone else on here have a similar setup and has SUCCESSFULLY managed to move onto 10.1.0.4181 (in the UK, on EE 4G??)
John.