The standards and technologies for wireless mobile communications are rapidly evolving to offer ever more advanced and efficient cellular services. Mobile cellular operators, including Internet of Things (IoT) and machine-to-machine (M2M) service providers, can no longer be sure the two dominant worldwide cellular standards—GSM and CDMA—will remain unchanged and in place permanently. In fact, both GSM (Global System for Mobile Communications) and CDMA (Code Division Multiple Access) are giving way to the faster and more spectrum-efficient cellular standard— Long-Term Evolution (LTE)—as operators recognize its potential. But the shift to LTE will not occur quickly or easily. There are many issues for operators to consider in the coming years as they evaluate their cellular network service deployment strategies. This white paper describes the state of global 2G, 3G, and 4G cellular services and what alternatives are available to companies when deploying IoT / M2M cellular devices internationally.