Not every firmware is a winner. The has a history of problematic releases. Here is what the community has observed:

The update reset the wireless radio configuration. This is common with versions 3.2.0.12 to 3.3.0.4. Fix:

to your router’s web interface (typically at 192.168.1.1 ) using the admin password found on the router's sticker. Navigate to Status in the left-hand menu.

Котировки