For those looking to use wifi to tether to you phone to your NextBook,here you go. What's more it does not involve rocket science or mucking about with the WPA-supplicant. Also according to the app makers your phone and tablet do no need to be rooted for this to work.
On your tablet, go to the market and download "PDANet" for tablets and install.
On your phone, go to the market and download "Foxfi" and install.
Open both programs, follow instructions and your good to go. I shouldn't take more than a few minutes.
Foxfi only works with Android and Blackberry phones, no windows mobile.
Foxfi's website says it does not work with HTC android phones, but it appears it may work if your phone is rooted.