Tenda uses dates in version numbers. For example, v16.03.30.3 means March 30, 2016. Newer is generally better, but read release notes—some optional updates target specific bugs.
The process of updating firmware is straightforward, but it requires careful preparation. A mistake during a firmware flash can render your router unusable (often referred to as "bricking" the device). To avoid this, follow these preparatory steps strictly. Tenda Wireless N300 Firmware Update Download
Follow this guide step-by-step, avoid unofficial sources, and never interrupt the update process. Your router (and your network security) will thank you. Tenda uses dates in version numbers
To update your Tenda Wireless N300 Go to product viewer dialog for this item. v16.03.30.3 means March 30