I think this should help, i did nothing else , its not peak time right now so maybe speed is better , but the fact i wanted to highlight was that I never to to get better speed on wifi. Also for firmware , my version is 1.26..... something , I found 1.30 by
google search but you have to risk to download from unknown source , file was around 8Mb, usually
TP-Link used to keep all latest firmware download link on official website , for
Syrotech i read somewhere that you need to mail them support@syrotech.... something that id is mentioned on website and ask for latest firmware , maybe they either provide file or link. I am not sure. And it may reset the device n all settings also device needs to be connected on power during updates