Do you really read that OP has a VODAP M8 and you suggest to use AT&T RUU .. the same case as before that you suggest the same AT&T RUU for a TELUS M8
Read man ... read OP ... many many times when your fingers get itchy to write something.
Another thing I always wonder why these people with AT&T like to hang around in Int'l GSM forum instead their own AT&T forum here : http://forum.xda-developers.com/att-htc-one-m8
You guys can help those needy in AT&T ... don't create confusion to the newbies on Intl GSM forum ... please
Unless you're a noob yourself then I have nothing else to say