Cable Matters has released a firmware update to resolve a compatibility issue with the Amazon Fire TV Stick 4K Max. 

Applies To

This firmware update applies to the following Cable Matters product:

• Micro USB to Ethernet Adapter for TV sticks (202053-BLK)

Resolved Issues

This firmware update resolves the following issues:

• The Fire TV Stick will not maintain a connection when connected to Ethernet

Firmware Update Instructions

1) Download the Firmware and Update Tool here, and unzip the folder.

2) Connect your computer to a power supply

3) Connect the Micro USB Ethernet Adapter to your computer using a USB-C to Micro USB Adapter

4) Connect the Ethernet Adapter's USB-A connector to your computer or USB power outlet

5) Double-click on "RtPGtoolUI.exe" to open the tool

6) Click the "Dump" button [1]

7) Make sure the "Fix MacAddress" box is checked [2]

8) Change the last digit of EXT_PATCH to "4" [3]

9) Click on "Program" [4]

10) Wait for the result to be "Pass" [5]

11) Power cycle the adapter by removing both connectors, and then reconnecting them 

12) Click on "Dump" and verify that EXT_PATCH is flashed to 00000004