A: No. Tenda often releases region-specific firmware (US, EU, AU, CN). Using the wrong one might disable certain DSL frequencies. Always select your country or use the "Global" version if available.
The Tenda D305 is an older ADSL model. If the official website shows no updates after 2019, the product may be end-of-life (EOL) . In that case:
Step 1: Log into the Router Interface
Step 2: Navigate to Firmware Upgrade
Step 3: Select the Firmware File
Step 4: Start the Upgrade
Step 5: Wait Patiently
Step 6: Verify the Update