For issues after applying this hotfix, reference hotfix ID when contacting support.

To ensure your device has the latest available security and performance patches: ADSL2+ 1 Port Ethernet / USB Combo Router DSL-2520U

In the world of networking, the "hottest" firmware is usually the most stable one. For the DSL-2520U Z2, updates generally focus on: Protecting against newer DSL exploits.

Fixing bugs that cause random reboots or Wi-Fi drops.