 For $10 or $20/month more per host device, the amount of data available for tethering can be increased markedly.The host device cellular services can be canceled, added, or changed at any time, pro-rated, data tethering levels can be changed month-to-month, and T-Mobile no longer requires any long-term service contracts, allowing users to bring their own devices or buy devices from them, independent of whether they continue service with them.The announcement also stated that "(Verizon) recently revised its service offerings such that consumers on usage-based pricing plans may tether, using any application, without paying an additional fee."