So i've been playing with a few of the TW based 4.3 ROMs and have noticed that I do not have simultaneous voice & data anymore when the modem (ML1) is in 3G mode. Has anyone else seen this? It had worked great on 4.1.2 whether using stock TW or a custom TW ROM. I've reflashed the modem a few times and I have not seen a difference. FWIW I've noticed this on Alliance, MOAR and CleanROM for 4.3.
All other functionailty behaves as I'd expect, a few annoyances, but those are all well known.
But simultaneous voice/data in non-4G areas was one of the reasons I bought the S3, and I'm sadly leaning on reverting back to a 4.1.2 ROM to regain this ability.
Any thoughts/suggestions on what to try before flipping back to 4.1.2?