This method will allow you to bypass the validation without having to worry about moving around APKs, backing them up, setting permissions, etc. It also will no longer contact the actual servers used to verify if you have permission to use the tether.
This Xposed module works by replacing the list of entitlement apps available in the string array "config_mobile_hotspot_provision_app" with an empty set. This means that the entitlement app is not run at all and defaults to the native tether immediately.
Works with VZW, AT&T, Sprint, DE and non-DE devices running 4.4 or above
- Be rooted and have the Xposed framework installed
- Search for and download "X Tether" under the download section of the Xposed installer
- Activate the module in Xposed.
- Tether away!
- SPRINT ONLY: Change the line ro.mot.tether_dun_required=1 in your build.prop file to ro.mot.tether_dun_required=0
Link to Xposed repo