It all depends on which Dingtone features you use. Here are the estimated data usages for typical Dingtone features and volumes:
30 minutes phone call: 3.5MB
1000 text messages: 300KB
Share one picture: 64KB
Share 2 minutes video clip: 1.6MB
Share a map (location): 2K
You can see your monthly data usage inside your Dingtone app. Open Dingtone >> Tap “More” >> Tap “Settings” >> Tap “Usage”. You’ll be able to check your monthly data usage for using Dingtone and your Call Records and consumption of credits can be also checked here, too.