Over The Air update refers to an official update from your device manufacturer and carrier, the update being pushed automatically to your device.

OTA update is basically a ROM update, as it covers the whole Android stack (drivers, firmware, kernel, VM, applications).

Over The Air update refers to an official update from your device manufacturer and carrier, the update being pushed automatically to your device.

OTA update is basically an official firmware update, as it covers the whole Android stack (drivers, firmware, kernel, VM, applications).