Google Mobile Services (GMS) and non-GMS Android devices have different use cases, advantages, and disadvantages. GMS certified devices offer mainstream consumer Android experience, pre-installed apps and services, monthly security patch updates, and access to Google Play Store. However, they come with costs such as licensing fees, timeline delays, and firmware update limitations. Non-GMS AOSP (Android Open Source Project) devices, on the other hand, provide flexibility in provisioning, deploying, and designing purpose-built devices for specific use cases, but may lack GMS applications and services, security patch updates, and access to Google Play Store. The choice between GMS and non-GMS depends on factors such as hardware brand, device models, quantity of devices, distribution channels, firmware quality and update infrastructure, applications, APIs, and use cases.