I recently followed a guide how to use an old router to extend my network at home. Everything was smooth, made sure the range I have set the DHCP Server won't conflict with anything (Main Router, from my ISP.) I've used 192.168.1.30 - 192.168.1.254.
Moving on to the old router. I've disabled it's DHCP so it wouldn't conflict with the server, set the old router's IP Address as 192.168.1.15. I've setup the wireless options as well, made sure it has a different SSID, even changed the channel selection so it wouldn't collide with anything. The LAN interface works, at the moment I'm connected to it as I'm typing this question. The only problem I've had is whenever an I try to connect to it wirelessly via an Android or iPhone it has limited connectivity. I am connected to the network, but I do not have an internet, the LAN ports work however. The 2nd/old router acts like a switch it seems. Any advice how to set this up properly?