The service layer architecture in telecommunication has changed considerably due to the emergence of new requirements. As the value of staple services diminishes, the focus is on delivering a vast array of offerings. However, nowadays, there is not much to choose between two different telecom operators. Whether it is an MNO or MVNO, the offerings are almost similar with minor difference in quality. The only things that matter are: speed of service delivery, pricing, self-care options, billing and security of customer information. Therefore, the focus is no longer on infrastructure and hardware, but on telecom billing software and OSS software telecom along with data security.