GMS is called GoogleMobile Service , which is Google Mobile Service .
According to GMS , Google grants different levels of authorization to Android phones and divides mobile phone manufacturers equipped with Android systems into three levels.
1. Free use of Android operating system, but no GMS embedded ;
2. Some GMS services are embedded , but mobile phones cannot be marked with Google ’s trademark;
3. Embedded all GMS services, you can also use Google trademarks. If the Google GMS service is built into the Android phone, it is equivalent to the product officially certified by Google.