I'm on stock rooted with Captains TWRP. I'm also S-Off. I didn't try to update PRL/PROFILE before I rooted so I don't know if that's related. My wife's Note 2 has no problem updating her profile and prl so it's not network or location related.
Just got off the phone with Sprint . They had me do a few nonesense dialer codes but it didn't work. They are advising me that I should try another location and if that doesn't work I have to take it to a Sprint store. Really don't want to have to do that.
Probably related to the issues many M8 users (and myself) have been having with Spark/LTE. If you switch to CDMA only, make sure domestic data is unchecked, and reset the phone, are you still unable to?
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer?