Soundwave on 26 January 2015
Nintendo would not dare compete with phone manufacturers nor would they be able to develop an OS suitable for the demands of what people want from a phone. Nintendo is a tiny company, they can make an OS comparable to even Blackberry let alone Apple/Android/Windows Phone.
A phone isn't just a joke or secondary device, a lot of people depend on their phone for their personal life, business, etc. it's not some functionality you just toss onto something as a bonus.
Beyond that Nintendo does not like to invite competition.
