How to identify if an iPhone is being managed by a service provider?

Would the fact that I purchased it second hand certified refurbished through Walmart.com be causing this issue? There were already purchased apps available on the store apps for “servicing” mobile devices? Also the incorrect Time with the clock is brand new as of now it’s saying 12:12a.m.?

I’m supposed to contact apple support to validate the purchase date? Even though I have purchased it from Walmart.com? listen! my original post was nothing to do with my service provider owning or managing my iPhone they are just being lazy and not paying attention to what I have been trying to tell them!.. Can I access a menu or is there a way that I myself can view or verify if it’s being managed it’s very important that I find out!.. again I apologize if this is not the right place to ask but it’s imperative that I know…