I just installed v3.1 on Sprint HTC 10. Went smoothly from v2.7 using TWRP 3.0.2-6.
I do get an Automotive_traffic service has stopped on every reboot. But have not figured out if it effects anything.
Also was not able to install Prism mod 8.52.860657 from the BadBoyz Modz application. When it reboots to install, I get stuck unable to unencrypt my data. Only option was to stay readonly and cancel out and continue regular boot.
yeah I'll update Prism in the zip...I just need to know if voice/data/sms/mms is working...