Why won't my iphone connect to my home Wi-Fi? - 1

I have an iphone and its been connecting fine but lately it has sometimes disconnected from my Wi-Fi but i could go to the settings and reconnect again but now it stays permanetely on 3g network and when i go to setting is doesn't even show my Wi-Fi even when it is know nor will it connect when i type it in right but on my ipad its on the same Wi-Fi please help

Change the settings in the router, or try tapping forget this network and start from scratch. But it sounds as if somebody mess around with the router and use a stronger encryption which sometimes gives some trouble connecting when it comes to Apple products.
My recommendation? Change the settings in the router.

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