CSPs are under pressure to modify their business models to compete with ICPs. To support new business models and digital services, CSPs must adopt agile IT systems. The percentage of operators migrating BSS to the cloud increased from 4% in 2016 to 15% in 2020, and 44% expected over half of BSS to be cloud-based by 2021. TSPs expect benefits from cloud BSS migration like higher scalability, improved consolidation, decreased operational expenses, and less capital expenses. With cloud BSS, TSPs can generate better ROI through accelerated time-to-revenue, lesser time-to-market, improved top-line growth, and reduction in capital expenditure.