Re: is windows 10 mobile stable enough to upgrade my L640?
OK, I have the 640 LTE dual sim. here is my experience. I'm lining out my 2 experiences so that you get a clear idea.
Experience 01 - BAD
I updated to windows 10 when build 10581 was out, what I did was upgrade, (install with all apps present and restore from backup).
good:
all my apps were there - no need to install
bad:
battery was draining within 3-4 hours even after all the updates were done via wifi.
phone crashing on apps, rebooting in the middle of things etc.
so I switched back to WP 8.1
Experience 02 - GOOD
updated the phone from WP 8.1 to WP 10 build 10586.29 last night. I let the install run and once the phone booted with the upgrade I went in and did a hard reset, sacrifysing all my apps and settings. Started to setup phone from scratch. that half an hour was worth it! phone updated almost 33 internal apps through app-store. did 2 - 3 reboots to install language packs etc.
Good:
phone runs buttery smooth.
everything works perfectly
no hiccups so far
for those who complain about missing quiet hours --> go to cortanas notebook and you will find it there.
no heating or fast battery drains, rock solid
Bad:
yet to experience any crash
theres no way to uninstall language packs - had to do another hard reset to get rid of an additional language pack I installed.