Note: If you don't have 4.3.4 client, download the WoW
Cataclysm mini client from here (run & play) OR download Full 4.3.4 Client from here (Magnet) or via (torrent
Step 1: If you don't have an account, Make an account here.
Step 2(Optional): Go to WoW Folder,data\EnUS/EnGB\, find realmlist.wtf, and open it with notepad, then remove all writing inside and write this:
set realmlist logon.openwow.net
Then save it (Note: you will not have to change realmlist If you download the full 4.3.4 client via torrent)
Step 3: start WoW.exe and log in with your WoWMortal account name.