LG G3 :: Why Does Phone Continuously Restart Even After A Factory Reset

So my LG G3 is almost a year old and recently it had an issue which started about a week ago, where it kept restarting every time I opened Snapchat. This gradually increased over time to the point where I got so frustrated I ended up uninstalling the app. However, my phone continued to restart which lead to me realizing that Snapchat wasn't the actual cause of the problem. So I did some research and came across different possible solutions but unfortunately none of them worked :/ One post I found suggested it might be the battery but I'm still not sure. Earlier today my phone restarted but on a loop and I ended up factory resetting it, which I hoped would solve the issue.