How can I fix my Wifi?

My Wifi works, but I have to get within 15-20 feet of my router. It's not only my own router, but my house's router too. They are different routers, but the one at my house is stronger. I'm pretty sure it's my phone and not the router because my school's wifi is also hard to detect. I was wondering if this had happened to anyone before and if it was fixed or is fixable. I have an iPhone 4, and it's been in use since around the time it came out.

Try resetting the network in settings and see if that helps

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