In Norway the carriers does this a little different. My carrier NetCom has just rolled out their new plans. No charge for calling, sms or mms, you only pay for the data. Plans go from 200MB to 6GB and the price is the same if you buy your phone unlocked or on a subsidy. You even get the choice to buy it unlocked from the carrier. If you buy it on a subsidy you can choose the downpayment time as well. And to top it of my carrier has the fastest 4g network in the country and will implement the lte to gsm handover and "HD" phonecall in the summer.