Reliance Communications’ Tariff Hikes in Feb-2013

Along with incumbent GSM Lobby comprising of Airtel, Vodafone and Idea Reliance Communications has carefully hiked voice call tariffs in selected circles and not across India. The following chart shows the Tariff hikes by Reliance Communications in Feb-2013.
rcom-tariff-hike
What do you think of RCom’s Mobile QoS ? is it poor that it is unable to hike tariffs and command premium like Airtel or Vodafone ?