Can we stop the b******g and moaning.

I'm in the UK so will only be addressing this from a UK legal perspective.

The sale of goods act 1979, with 1994 ammendments states that.

When you go shopping anything you buy is covered by a law called the Sale of Goods Act 1979. This means that when you buy a product it should be:

* as described
* fit for purpose
* of satisfactory quality

As described

This means that the item you buy should be the same as any description of it. A description could be what the seller has said to you about the item or something written in a brochure.
Fit for purpose

What you buy should be able to do the job that it was made for. Also, goods should be fit for any specific purpose you agreed with the seller at the time of sale. For example, if you were looking to buy a printer and asked the seller if it would work with your computer then that advice has to be correct.
Satisfactory quality

Goods that are of satisfactory quality are:

* free from minor defects (problems)
* of a good appearance and finish
* strong and safe

It goes on to say that the goods MUST be of equal quality to and demo products/services.

The OVI maps advert says free navigation, and shows lesser spec'd devices running full blown sat nav by means of OVI maps 3.5.
It is therefore justifyable to believe this device should also have maps 3.5.