Second, they can adjust their pricing to make OTT services less attractive, either by charging more for rival services that piggyback on their networks or by making their own cheaper.

ECONOMIST: Over-the-top phone services

There was a major flowering of voice-OTT services (mainly based on call-back) half-a-dozen years ago (most of which died off), while Skype has migrated from desktop to mobile as well.

FORBES: 2.5bn Mobile Social Network accounts

This inequality is forcing the carriers to reexamine their operational model to determine ways of sharing the profits from OTT video services.

FORBES: Why The Future Of Video Depends On The Mobile Carriers