H3ART HACKER

I have the older version of the router it's the 1.03.3 and I need to upgrade it but don't know how or should I even do it or nah, plz help asap! Plus I already hard resetted my router couple of times because it wasn't giving all the download speed that I was suppose to get, I did a speed test and bypassed the router and I was getting a good speed from the providers but the router wasn't providing it all! I thought upgrading it might be the way so here I am. I need help asap. Ty