wifi not connecting to iphone 4s

My iphone 4s just stopped connecting to to my wireless router. Chat room  say the fix is to update wireless router. Is this a good idea, and how would you do it? Actiontec model M1424 wr

Re: wifi not connecting to iphone 4s
Super User
Super User

Let's see what we can do to troubleshoot the phone first, before we go and replace the router. To start off, let's get some info here.

1: When the phone states it is unable to connect, what is the actual error you receive, if any?

2: If you go to Settings, select Wi-Fi, and then click on the Blue Arrow next to your network name, do you see any info such as an IP address, Subnet Mask, and a DNS server filled in?

3: Is the IP address a 169.254.x.x address?

4: Have you tried forgetting your network from your phone, and then re-entering your security key? WEP keys should be typed in all caps, whereas WPA and WPA2 keys are case sensitive.