I asked about IP address from WAN port (tp-link) and IP address from network card when you have internet access without TP-link. Do you understand?

In this same place with "Static" mark.

Roaming system - features automatic switching between AP , not used in SOHO routers like TP-link. I think that your phone don't want to switching between your SSID and keeping all time same...

It's impossible support two WAN connections in same time on this router. You can see SMB solutions with two WAN ports.

Have you seen FAQ - http://www.tp-link.com.pl/article/?faqid=639

Region : Poland Model : M7350 Hardware Version : V1 Firmware Version : ISP : Plus or Play http://tplink-forum.pl/opinie-uzytkownikow-opinie-ekspertow/tp-link-m7350-3673 - you can see private testing...