Based on Android CDD document, a device must support an update mechanism to system software. It may be one of following kinds:
- Over-the-air (OTA): by
Settings > About Phone > System Updatesto install new version when it is available.
- "Tethered" update: update over USB from a host PC
- "Offline" updates via a reboot and update from a file on removable storage
I could understand clearly the 1st and 3rd mechanism but I'm confused about the 2nd. As my searching, "tethering" is used to connect the Android mobile to a host PC through USB cable then the PC could use mobile as a modern to access internet.
So I don't understand why that "tethering" is seen as an update mechanism?
Anyone has experience about this kind please help me to clear about it.