For specific hardware like Android Smart TV boxes or tablets that won't update via the settings menu, you may need to force an update. Prepare the Firmware:
You have three choices:
The safest way to perform an is through the device manufacturer's official files. update android 5.1 1 download
If your device does not find an OTA update, you need to manually download the or stock ROM for your specific model. For specific hardware like Android Smart TV boxes
For many older devices like the Samsung Galaxy S4, Nexus 5, or older LG models, 5.1.1 was often the last official software update they ever received. or older LG models