Why Android 4.2 phones won't have multi-user login? Hint: Nokia holds the patent
Android 4.2 came with a new multi-user login feature, which allows you to logoff your important stuff, and go in the tablet with restricted access when you are handing it to your kid, for example. The option is only available on the Nexus 10 and 7 tablets, though, not on the Nexus 4 handset. "Available only on tablets," advises Google in the feature description, and leaves it at that.
This omission has certainly nothing to do with software engineering prowess, of which Google has plenty, but rather something more convoluted, in the form of a Nokia patent filed long time ago, which has booked the multi-user feature for its own phones.
The patent, called "multi-user mobile telephone", was filed way back in May of 2005, and contains the following:
Kid's Corner functionality, visualized in our hands-on video below.It is hard to argue against such a thorough description, and Windows Phone 8 seems to have taken a good advantage of the fact that Nokia is the patent holder on this one, leveraging its merits best into the