As with every Microsoft-related software upgrade (desktop & mobile), while 8.1 on my Lumia 521 solved one problem, no connection with any secure WiFi networks with security protocol higher than WEP (unless access to WiFi router), Cyan cannot maintain any wifi connection, open or secure. Also, the intrusively annoying Cortana does not support landscape on the 521's stingy portrait keyboard suitable only for the Chinese toddler who apparently designed it. And finally, absolutely no evidence on this toy phone of Cyan's alleged "Media Center," and the convenient on-screen volume control necessary to compensate for the cheesy little Power, Volume & Camera access buttons that snap offf the moment one removes the battery cover to reset the phone after one of its gazillion screen freezes. 8.1 already trashed a brand-new Asus laptop last year, after months of looking for fixes for all its bugs. Think all Windows owners deserve a Microsoft 401K for all the time we've wasted trying to fix their crappy wannabe products. This way we can all afford to buy a real smartphone like Android or Apple and finally finish some of the the things we intended to do each time we turned on our Windows devices only to get waylaid by the latest Microsoft improvement (using that term as loosely as the use "upgrade").:angry: