WP8.1 Lumia interop unlock (jailbreak)

[dxdy]

Fair warning: interop unlock at your own risk as it can cause some problems and (can) voids your phone warranty.

In case of trouble, simple do hard reset or flash new firmware with Lumia Software Recovery Tool

Requirements:
- Lumia Windows Phone 8.1 with SD card
- developer or AppStudio unlock
- WP SDK 8.1 or WP SDK Lite
- CustomWPSystem_0600.xap and vcREG_1_2_BOOTSTRAP.xap files

1. register with developer or AppStudio account

2. unlock your phone with WP SDK

3. interop unlock: all is here

Enjoy

P.S.
good homebrew app for interop unlock:

WPTweaker: registry tweaker for WP8.1

AppData Manager [v.1.3]

P.S.2
also you can block Ads with "hosts" file in Windows\system32\drivers\etc\
if you enable Live Full FS Access