> I was wondering if these things really work or are just another scam?
> Any experiences?

If they really did, you'd think Nokia, Vodaphone & co would risk
adding a microcent to the phone's cost for "300% improvement"

It's one of those products that you can scam with on an individual
basis. I read a book about mail-order once which had a section on
conning customers. If you have something cheap enough that doesn't
work (and especially if it's costly or difficult to prove doesn't work)
most people will not ask for their money back. It'll either go in the
bin or not get used. If you buy off-shore then you've probably got
no recourse for a refund anyway

What could happen, as has recently with some weight-loss products,
is that there's a blanket ban by commerce and advertising agencies
but that's unlikely to work on the web vendors

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