Wireless carriers are a low-margin, increasingly commoditized business. Apple is only interested in expanding into high-margin businesses like services (iCloud, Apple Music, Apple TV, etc.) where they can offer unique value (e.g. privacy) compared to their competitors. Apple keeps so much cash on hand because they have more money than worthwhile ways to invest it.
These minibusses or dollar vans don't have strong brands that you would recognize. They often operate in a legal grey area, so they're deliberately anonymous looking if you aren't in the know.
https://en.wikipedia.org/wiki/Dollar_vans_in_the_New_York_me...
You're in luck! There's a dozen Superchargers available right in downtown Lone Pine: https://www.plugshare.com/location/60596