One of the forum moderators pointed me at this thread ( http://forum.xda-developers.com/show....php?t=2586586 ) as a suggestion to getting a ROM for my S4 that would alleviate the com.android.phone process crashes I had with other ROMS.
After flashing jfltespr_mk2_deodexed from micro-sd card through the Team Win recovery, my phone is now stuck at the Samsung Galaxy S4 logo screen with (Set Warranty Bit: Kernel) in the upper left.
Having looked through numerous threads on this issue, it seems there's a number of different remedies, from reflashing to simply powercycling.
There wasn't anything that was of much use in http://forum.xda-developers.com/show....php?t=2527706 either.
I have odin, and can boot into Team Win Recovery, or download mode. Suggestions/tips/ideas would be appreciated. Thanks.