Hello there, good news to the owners of Samsung Epic 4G Touch from Sprint, you can now update the software of your phone to fix and enhance Security update, Dismissing multiple calendar alerts, Commercial Alert System (CMAS) activation, 4G Sprint Hotspot disconnects when in a phone call and Radio loses signal and may require power cycle.

My friend just shared this link to me and I hope this will help you too.
Sprint Community: Samsung Epic 4G Touch: Samsung Epic 4G Touch Software Updates