Coloring Ring Back Tone To subscribe to the service, send A to 822 or visit our CRBT portal www.crbt.et. To unsubscribe the service, send U to 822 To get support send H to 822 Benefits & features of the service It will give you a unique identity It can turn the wait for an answer into an entertaining, social, and informative experience Makes your callers enjoy and relax while making a call to you You can assign different ring back tones to various contacts You can also assign CRBTs for a specific time segment, such as morning CRBT, Holiday CRBT, Valentine’s Day CRBT, etc. View More