I have Wi-Fi on my computer, but not my mobile devices?

The internet connects to my computer, but not to my iphone, my moms iphone, brothers ipad, or printer. I have tried resetting my modem and the Wi-Fi. I have retted the settings on my phone. What should i do?

This is issue with security policy of wi-fi. Check your pc what wi - fi security policy it uses. It may be WEP, WPA Personal etc. You may need to use the same policy on the other wireless devices as well.
Also Wi-Fi needs to be turned on. Trivial but it happened to me more than once…