Hi Folks,
I have a new HTC U11. All else works, except outgoing texts generate "unsuccessful" alert even though they all have been received. Outgoing calls hang up before any receiving phone picks up. I had a voicemail app (Youmail) which does track every call, but shows all calls completed successfully. I deactivated the service and rebooted the phone, but there is no change in the problem. This is a big safety issue, not to mention hassle. Cannot reach Verizon for help.