The problem with roaming SIMs is management. They often roam into countries with expensive data rates or use more data than they should. This results in data overage charges. On a single SIM this is bad enough, but for MSPs managing thousands of SIMs in smart devices globally, this is a serious problem.
What MSPs really need is a management portal to see where each SIM is at any time with the ability to set up alerts should any wander into countries with higher data charges. A single supplier and one portal are much easier to manage than multiple suppliers in different languages. The ability to share data across an estate is also useful to avoid overage costs. Real-time data is essential to accurately estimate usage across the estate as well as full automation so that requests for activations, bolt-ons and ceases are implemented directly.
Most importantly, MSPs need reliable, cost-effective mobile data which is fit for purpose and which they can control without needing to go out to site and run surveys.