Why does it take so long to buffer a YouTube video on my iPhone?

I have an iPhone 4 and my Wi-Fi is very slow for buffering videos of every kind as it takes like 10 mins to buffer a 2 min video and it doesn't do this at friends houses and T's only on ios devices here at my house tht have that trouble. Any way I can make my Wi-Fi faster?

The speed depends on the plan you are subscribed to. Maybe your friend has a high-speed connection to the internet and that costs money.

To make the most out of your current connection, disconnect all other devices from the router or modem.

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