Haha, you can use the web management page.:D Connect your laptop/smartphone to the Wi-Fi of M5350, open a browser, type in http://192.168.0.1 to log into the device. You can configure what you want....

Channel 14 is only for 11b mode in Japan. No need to use channel 14...It is helpless...Believe me.

Check whether the reset button was stuck when you pressed it down. Rule out that and then try to reset it again.

Have you rebooted the router after changing the management port? If you do, it can be a bug. (I don't think it will be fixed since V7 is discontinued long time ago.) You can try a third-party...

No, both left and right antennas are functioning. I 100% sure because I'd confirm similar questions before from the global support. Now I answer your query. TP-Link TD-W8968 as a 300Mbps Wi-Fi router...

You may also adjust the wireless settings on your router. Log into the router, find the wireless settings menu, there should be a option called channel width or HT mode, select 20MHz for better...