So sorry to hear about this experience, Kidbooo. This seems to be some technical issue with the device. We recommend taking the phone to an Apple store so a technician can take a look at it. If there’s anything else that we can do for you, let us know.
I’ve been having a similar problem. My phone will lose service so I turn airplane mode on and back off. It comes back up sprint LTE and then seconds later it no longer says sprint. It just displays the bars and somehow I’m on 3g all of the sudden. Happens mostly in the middle of the day for several hours and while playing PokémonGo. Hope someone has answers
Hey there, @lovelash! We're deeply sorry to hear that. Can you please provide us with your nearest cross street address and zip code where this occurs? That way we can take a closer look at this situation.