Microsoft is readying a push to revitalize its Windows mobile operating system. The company will Windows Mobile 7 at next month’s Mobile World Congress in Barcelona, Spain, according to Cnet. Windows Mobile 7 has been billed as a major revamp of Redmond’s mobile OS. The source code, which is undergoing a complete rewrite, will reportedly be finalized over the summer in time for a rollout this fall. The company is also said to be working on a new consumer phone under the Sidekick product line.