myAT&T app today got updated to v4.4 with the ability to view your Rollover Data balance. myAT&T lets you manage your AT&T Wireless, U-verse®, home phone and Internet accounts with your Windows smartphone.
Here are the new features available in version 4.4:
• View your Rollover Data balance
Plus the previously released features:
• Use myAT&T to get support for your mobile device
• Easy to view month over month bill and usage comparison
• Numerous performance enhancements & bug fixes
Download it here from Windows Phone Store for free.