Chatted with Verizon's online help. (very good and quick by the way)
Sent me a new modem in 2 days. Had (Westell), now (DLink) It set up all by itself (wow) Still no WiFi luck
Chatted again because I forgot how to go into the setup for settings, User Name, Password, etc.
There is a very long generic network and password printed on the modem tag. But underneath the modem is the logon information (dah!) for getting into the setup
http://192.168.1.1
Changed my wireless network name but decided to keep the secure, long password as suggested.
Anyway the main point is this: Your password for using the HTC One should only use
UPPERCASE LETTERS (with numbers is ok)
WiFi now works great. AND after a day, the battery life seems to be back to normal. Not sure why??? Happy!