Please elaborate, because Verizon, Sprint, and US Cellular do not do this. In the past, and on Android, AT&T and T-Mobile still split out 3G, 4G (H+), and LTE.
I forgot to clarify that I was referring to GSM devices. AT&T and T-Mobile devices will never display 3G, but rather 4G. This includes the LG G4, Galaxy S6, and all iPhones newer than the iPhone 4. Unlocked devices that aren't modified/optimized by the carrier will differentiate between them all.