this only works for some people as well
the only way to change your IP for sure is to do it via your modems control panel or ask your ISP to change it.
this is how you change IP on my modem: nothing else works(Zyxel 660)
Code:go to https://192.168.2.1/ login Diagnostic(under maintanence, far right) Network Layer Release Wait for page to refresh Renew Wait like 20 secs Side bar->System Status Check that your active DNS is not 0.0.0.0, else repeat