My iPhone 4 always goes off Wi-Fi?

When I go on the Wi-Fi in my home on my iPhone 4 it always goes back to 3G after 20 mins or so. Why is this? The connection is just fine…

Get a 4S

Try resting your router or restoring your iPhone. Maybe that will fix it

My phone does this periodically. Its worth resetting your phone and re-typing the network key when it comes back on. It can be painful sometimes I understand.

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