Nokia has tweeted that it's doing something having to do with innovation on Oct. 22, but it won't say what or where. However, there's heavy speculation that the company set the date to unveil its much-delayed Lumia 1520 phablet. The phablet is rumored to have a 6-inch 1920 x 1080 pixel HD screen. Though tech specs purporting to belong to it have proliferated on the Web, nothing has been confirmed.