Go on the Settings menu, and then on Wireless Connections menu, then find USB Tether :)
my firefly mobile A530 sucks! keeps on switching display or menu or screen etc and it does not connect to any wifi... i am really disppointed, cant even finish my txt msg... the HOLO launcher and the the other launcher keeps popping on my screen and sometimes it auto direct my screen to google search tab... i need help from this... i wanted to hard reset it without opening my phone, i have already tried resetting my other android fon buit i dont know how to reset this one... this is really giving me a hard time...