BREAKING: Apple says it has not discussed & is not planning MVNO cellular service following reports saying it was planning on doing that.— CNBC Now (@CNBCnow) August 4, 2015 According to a CNBC tweet, Apple has denied reports that it is in talks to launch a mobile virtual network operator service. The denial comes one day after Business Insider published a story claiming Apple was interested in leasing space from existing cellular carriers…