I'm not sure I see any reason to update from my R3 setup at this time.
I am on Verizon, running Dusk theme & everything works perfectly.
My SMS/MMS works great as does my Sirius & Sling Mobile etc etc.
Does anybody see any good reason I should move to R4 & redo thee whole system again?? I have a
TON of customization, apps/programs installed etc. & it would take a while to redo it all, but if it's worth it I would probably do it anyway??
~John