I used to have an old HTC Droid Incredible. Rooted, with wifi tethering. Worked flawlessly for years. Then, about a month ago, it stopped working.
I thought it was the ROM i was using (cyanogenmod) so i went back to stock. Wifi tethering still didn't work.
I thought maybe it was the wifi tethering app I was using, so i tried 2 different ones. Wifi tethering still didn't work.
OK, maybe it's the tower near work that I'm trying to get on. I'll try on the way home, and again at home. Still didn't work.
Well, maybe it's my iPad. I'll try my other devices. Tried my android tablet, macbook, and alienware laptop with both windows and ubuntu. Still didn't work.
It's gotta be my phone, I thought. So I got the Droid DNA. Hotspot doesn't work anywhere, with any of my devices.
Just for fun, let's try the wife's iPhone5 (also on Verizon). Hey, what do you know, it works flawlessly.
I'm thinking there has to be a flag on my account or something. Now I get to fight with Verizon tech support all day...