IPhone 4 won't connect to home Wi-Fi suddenly?

IPhone 4 won't connect to home Wi-Fi suddenly?

Added (1). My laptop is connecting fine just my phone. I did a basic reset and it's still not connecting and now when I open my apps I need to sign in again. When I go to settings my home network still comes up but it just says unable to connect.

Added (2). I made my phone "forget the network" and just resigned in. Now everything's working fine.

Let me connect my iphone to your Wi-Fi and we'll be online.

Try rebooting the router (NOT RESETTING). I would worry that having managed to keep an iPhone 4 alive for this long is VERY rare (Apple mobiles have an average life span of just 2 years) and you phone is not just a pensioner, but more akin to the living dead. *Though i do commend you for managing this!

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