rainmakernyc, Were you able to perform any troubleshooting steps when you took the device to the store? Are you experiencing any other inconvenience, besides slow data speeds, are you having issues with calls, or text? Is this occurring in one or multiple locations?
Sprint Social Care Team
I'm having a similar issue with my new boost mobile s8. My galaxy j7 sitting right next to it is getting 15-46 mbps. My s8 on occasion will jump up to 9 or 10 but then right back to 1-2.5 mbps.