Navigation system (Dubai)

Dear All,
I've started to drive in Dubai, more in Jebel Ali Freezone, and I got lost two times, really badly. Can somebody recommend me or advice me what is best navigation system or how to learn the roads easily.? One of my friends has Garmin and doesn't really show many roads, building. Jebel Ali Free Zone is very big,no roads names ...towers. I do not know how to navigate there. Any ideas, experiences are very welcomed! Thanks and regards, Katalin