All of my devices can connect to this router but only my PC ad iPads have internet while my iphone, ipod and laptop don't have internet.

Here's the setup of my network:

DSL modem --- router1 --- (bridged / wireless) --- router2 --- (utp cable) --- router3

All the the routers are wifi. Only router1 have DHCP enabled.

Only router3 has the no internet problem with some devices.

I've already restored router3 to factory settings and reconfigured it but still the problem persists.