I used to use a free app called "On Call End" on my Optimus. I haven't tried in on my GS3 but give it a try. Its in the Play Store and iirc gave various options for display after ending a call.
Thanks Skunk, I'll redownload the ROM and try again this weekend. I haven't a clue why I was loosing root. Maybe something was corrupted when I downloaded, so I'll try fresh. I didn't check the md5. I'll also try a clean flash with full wipe.
Lost root! I was running rooted stock LJ7 and flashed both the odexed MB1 rom and the modem in post 2. Dirty flash but wiped dalvik and cache. Both flashed successfully but the phone seemed to lag and I lost root. Confirmed that with Root Checker Basic. I went back and flashed Team Epic's Root...
ES File Explorer does as well and supports other cloud storage too, like Box & Google Drive. The integration is pretty good and you can copy files from one service to another using ES.