Beware of the notorious Prague taxi-drivers

There is one thing that brings real disgrace to Prague, it's the thing that causes problems
every season, although it is easy to avoid. 
First thing to do is to avoid taking taxi right on the street. There are many miscelaneous
cabs going up and down the streets all around, and just few of them belong to respectable
companies as Halo-Taxi, Profi-Taxi or AAA. So it could simply happen that you will
bump into a bad guy. And i guarantee you really will! To avoid all these troubles
phone straight to the central office of one of the companies quoted above and ask them for a cab. This service is without any extra charge - you will pay just for phone (common local call).
The Prague numbers are :

AAA Taxi 233113311
Halo Taxi 244114411
Profi Taxi 261314151
If you need to take a taxi on the street from any reason, just deal with taxi-driver following
these instructions:
1. The price per kilometre has to be written on front doors of a cab
2. Tell the driver exactly where you want to go
3. Ask him for a price before you get on. If he pretends, that he doesn't speak any other
language just show him this question written in Czech (see the leaflet below) and let him write the price down
4. If the price seems to be higher than you expected claim for a receipt. Every car must have a printer and driver must give you undersigned receipt, otherwise YOU DO NOT HAVE TO PAY ANYTHING - that is the law. Check if the the price on the receipt is the same as the one demanded by a taxi-driver. Having this you can always prove what happened
5. The golden rule is - if the driver behaves somehow strange just tell him NO and
take another cab
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Kolik to bude stát ?
(how much you're gonna charge for it?)