After three years of loyal service, I think I'm ready to retire my LG G4 and replace it with a OnePlus 6T. I have some time before it's delivered, and now seems like a good time to get my affairs in order.
1) The G4 is currently activated on Ting, but is a Sprint device and therefore CDMA. Since this phone is unlocked and on GSM, will I need a new SIM card?
2) If I need a new SIM card, can I keep my current phone number or will I need a new one?
3) Anything else I need to be aware of changing bands from CDMA to GSM?