Can confirm. Ls990 dirty flashed latest. Lost cell data. Tried reboots, Network reset. Installed super su and xospapps when noticed missing. Still only data on Wi-Fi.
Sent from my LG-ls990 using Tapatalk
Edit: rebooted again and avg Sprint data again
I'm on the same boat as you. I found that every single time I disconnect from WiFi, I have to restart my phone to get back on mobile data. It's frustrating because I stream music in my car all the time. I've tried reflashing my APNs (I'm on the Boost LS990) and nothing's worked. I haven't been able to find anything anywhere else regarding a fix for it.
EDIT: I've found two ways to get around the failed hand-off between wifi and mobile data. One is to restart the phone. The other is to go into network settings and switch around between LTE and 3G and 1x. LTE and 3G never came up when selected, but 1x did, and it also displayed the correct network name in the mobile data tile instead of Digital Roaming. I switched back from 1x to LTE and it came back on after a few moments.
I remember giving up completely doing network fixes on an old stock rom that I used to dev for on boost and I can tell this probably isn't much fun to fix either.