Which is the best brand for Sat Nav on a mobile phone?

I heard Tom Tom was the best, but what about other brands? can anyone tell me of their experiences with other brands, whether it was on your mobile phone or in the car?

Thanks

Answer:

Mine has CoPilot pre-installed and it%26#39;s not too bad. there is no other better brands/software. Tom Tom 5 is best and works with most Symbian based platform phones. with others you most likely to call the AA cos you got lost

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