Hello, so recently I bought TP-Link TL-MR3020 and its all working fine, all of my devices use DHCP as it IP setting. Then I try to change some settings, then the wifi stops working. So, I reset the modem. Then. when I try to connect my laptop to the wifi, its working fine. But my phone and iPad can't connect to the wifi. Then I tried to use static IP and now both working fine. The laptop still uses DHCP. Why my phone and iPad can't use DHCP?

Thank you.

note: Most of the time I also can't go to router configuration (tplinkwifi.net’s IP address could not be found), I already tried tplinkwifi.net, 192.168.1.1, 192.168.0.1.