Billing and charging are two of the most important aspects of telecom operations. In today’s time, customers are really concerned about the charges that they incur as a result of their service usage. So, if you are making errors in your billing, which is very much possible when legacy charging systems are used, you are likely to face a backlash sooner rather than later.
Source
https://kruthai.com/read-blog/25514
https://kaalama.org/read-blog/30517
https://social.heyluu.com/read-blog/28702
The pace of innovation of telecom tech has increased a great deal in the past. Companies in the telecom domain need to keep up with the pace and come up with billing solutions that meet emerging customer requirements.For example, MVNO, MVNA and MVNE need to have carrier-grade billing and B/OSS platform in order to keep their customers satisfied. In case, a customer has already used self-care and other innovative options from other major telecom services provider, he would be less willing to come on board even if the services are reasonably priced by an MVNO.