When it comes to data plans on your mobile device, mileage varies from carrier, to region, to country. Some people might be grandfathered into unlimited data plans and now eat as much as they can on blazing fasts LTE networks. Others might be in an emerging market and are just experiencing 3G speeds for the first time. One way or the other, Nokia has an app that recently left beta to help people with tighter data budgets. Nokia Xpress is ready for the limelight.