Why is it that my iphone only connects to Wi-Fi when my laptop is turned on?

I have a Iphone 5c and after school i go to my sisters house and she has brighthouse internet. My Iphone doesn't connect immediatly or even the whole time i'm there. BUT…
I have my laptop there too and whenever i turn it on my iphone connects to the Wi-Fi?!
Why is that? And How can i undo that so my iphone connects by itself?

You can try by resetting your network settings from phone but please be aware all of your saved networks and password shall be gone. Alternately you can try by forgetting the network which is giving you error and then try connecting it again by giving password again.

  • Youtube app only works on iPhone 4S when Wi-Fi is turned OFF? Can someone please explain this to me? It's usually the other way around for everything else on my phone but with this new Youtube app I can only watch videos using 3G. I checked to make sure it isn't a problem with my internet and it isn't. I really hope someone can help me with this because it uses up my data plan when I'd rather just use my Wi-Fi.
  • Why does when the iphone 4 connects to the internet, the Wi-Fi lags? Whenever my sisters iphone connects to the internet and i play a online game league of legends for example, i get a very high ping and i start to disconnect and reconnect. Could you help me fix this. Oh btw, my sister won't get off and shut her iphone down.
  • Why does my phone only charge when it's turned off? I have an iPhone 6s. My phone only charges when it's completely shut off, and even then extremely slowly. I've tried different chargers and I don't think that s it. When it's on and I plug it in the lightning bolt doesn't show up and the percentage fluctuates a lot.
  • My iPhone turned off by itself and turned back on while using a app? When I was on YouTube my phone just shutted off by itself then turned on. Is there something wrong with the phone. Also when I click my home button one time the phone sometimes wouldnt come on till the second click. What can I do?