If you have a Google Edition phone without the Samsung software, you wouldn't have Blocking Mode anyway
. It is standard with the versions that have Samsung software intact, but a select few carriers removed the feature.
Samsung Galaxy S® 4 MJA Rooted with CF Auto-Root Tutorial
HTC EVO Design 4G™ v4.0.3 Bootloader Unlocked & Rooted with HTC SuperTool v3
If it ain't broke, use a sledge hammer.