if you live in a crowded area, try adjusting the broadcast channel. Barring that, it could be the router overheating as Nasstee said before. There's an app for Android called Wifi Scanner. It's usually my first check when my wifi goes crappy. I can see which channels are most crowded. It's also important to note: Due to the way the channel bandwidth works, only channel 1, 6, and 11 are viable. if you attempt any channel other than those three, you can pick up bleed over.
Thanks for the info, I didn't know any of this.
Flashing a router with new software is always a good idea, assuming your router supports it. I use an OLD Linksys router specifically for that reason. However, if your not 100% confident in your tech powers, dont try it because you can brick your device. Also: if you have a company like Comcast which you rent a router from, REALLY REALLY look into buying your own equipment. The rental units nowadays offer public wifi, which can and will effect your performance.
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