The DWI259S is a high-performance 4K streaming box with the following hardware profile:

: Community members discovered a secret handshake to enter the system’s underbelly. By holding the side power button while switching on the rear power switch, they could force the box into Android Recovery Mode.

If you want, I can summarize steps to safely obtain firmware for a Technicolor DWI259S (official channels to try, precautions when flashing, and what to avoid).

Since you can't do it manually, you must trigger the ISP's auto-provisioning system.

There are shady forums (Reddit, DSLReports) where users share .bin files for the DWI259S. Do not use them. These are often:

distribute software updates to service providers first, who then test and qualify them before sending them to your device. Warranty & Security