No, I think I have it fixed now.
De-select Smart Network Switching, then update my PRL and then reboot.
I test software for a living in the financial sector, so I like to play around with issues and fixes to get at the root cause.
Not working for me today either. Failed twice yesterday, but updating PRL and rebooting fixed it. Today Updating and rebooting is no longer working. I have done nothing to my phone since getting it working a few days ago, so can only assume that the problem is with Sprint, not my phone. Just going to wait until it gets fixed permanently.
Pretty much the same as everyone else... See previous fixes listed in the thread. This is so incredibly aggravating.