Quite easily and it has nothing to do with power. Like any install, sometimes theres a glitch and they get stuck. Unfortunately that can mean having to plug into iTunes where it does a restore in order to continue. However, I noticed with my most recent update that there seems to be a built-in recovery that takes place. It keeps all your data but seems to reinstall the lot.
To hear 'quite easily' is not very heartening. This is iOS, a Unix based system, not Windows Vista.
Thank goodness there is a "recovery" mechanism in place to actually save the phone from itself.
An update is so far from an atomic activity that it would be idiotic not to build in a failsafe / abort.
One odd thing about Windows 10 1511 is that sometimes when I tried to install it on other computers, it would fail. However, at the very least, the installation / update process recognised the failure and rolled back the computer to its last consistent state. So no panic.
To be honest, software companies - including the more "tech" based ones like Google - are so scared about exposing too much info to users these days that things can go wrong but you'll either see a very generic error message (not even something that a technician or programmer can use to trace back), or sometimes no message at all, or even rarer but still sometimes, a (false) success message! All in all, freaking pointless - what is the big deal with having things go wrong and no useful error message or context to be able to tell someone about the problem?
Apple phones have 24 month warranty
I didn't know that. Before, the only way to get 24 months was to buy Apple Care. Now it's 24 months standard?
I think you were very lucky. Wife's 6+ refused to charge its battery (60% charged) and failed to finish backup to the cloud on 3 attempts (so it could be returned for replacement by apple, although (just) out of apple (12 mth) warranty, but still in phone provider plan, and hence warranty by them). Its been away and in transit for 3 weeks now but is promised for Monday.
I'm glad we didn't buy it outright and only get the apple warranty, as I suppose we would have had to go to consumer affairs to persuade apple that a 12 mth warranty does not finish at 12 months, and consumers do have some expectations that an item will continue to work properly, even when it is out of warranty.
According to the guidelines, consumers have a right to expect that a product will work over its reasonable life time, even if not "covered" by a warranty.
The reasonable lifetime of a smartphone should be at least 2 years, so if it failed in month 13 I'd say you have a good case to get Apple to foot the fix even if there was no warranty to cover it. Getting them to do stuff (or any tech company / reseller for that matter) without getting consumer affairs involved can sometimes be a challenge, though I've heard that Apple have gotten rather shy about all this so sometimes they'll just do what you want them to do without asking for any verification (e.g. broke your screen? No problems - here's a fresh one. No need to say you accidentally stepped on it or drunk dropped it or something).
