Had an XPERIA Z1 once and after every software update, the battery would go normally from 100-75%, then go directly to 0%.
Spent more time having warranty repairs than it was in service.
Indeed I used to have a Z1 which was the worse phone ever made as every call would have the person at the other end asking if I was using it on Hands Free when I wasn't as the call quality was well *****!
I've used all three systems and despite the lack of support by developers and Microsoft I found the Nokia Lumia range to be quite good.
What's interesting though is you take 2 phones released around the same time ie September 2013 and you get one which is still supported by the manufacturer with the latest OS update being last month and the other with the latest OS update being over 3 years ago!
I am of course referring to the Samsung Galaxy S5 and the Apple iPhone 5s now can anyone guess which of the above is which?
A side note, does anyone know what happened to Zerolemon as I used their batteries a few years ago but they seem to have well disappeared.