Verizon Wireless Offers SMS Status Updates on Data Usage

Starting this week, Verizon Wireless' smartphone users will begin to receive free text message alerts when their data usage crosses thresholds of 50 percent, 75 percent, 90 percent, 100 percent and 110 percent of their data plans' monthly allowances. A number of other online tools are being added to help track mobile data usage.
http://www.verizonwireless.com