If the prepaid subscriber makes a call, but his account balance is insufficient to make the call or his credit card expiration has expired, the Callback service will detect and record the request to create a Missed Call, for the target audience. Using this service, destination's subscriber will be notified of the request to make a joint call and, if you wish, will initiate a call with the subscriber. It should be noted that if the destination's subscriber number is from other domestic mobile operators, the Callback service will still be able to create a Missed Call for that number.
How to activate
This service is enabled by default for all of RighTel postpaid and prepaid subscribers.
Using of this service is free of charge and there is no additional cost to subscribers.