Just got off phone with Sprint sero CS rep. The rep checked with technical and apparently since Sero customers are supposed to be under the power vision plan which includes navigation (telenav) for free. The rep couldn't figure out how to set my account so that I wouldn't get the pay prompt when I start telenav so instead decided to just give me a $10 reoccuring credit to my account to offset the monthly payment for Telenav. Funny thing is, I could just not use Telenav and use Google Maps and pocket the $10 monthly savings