As you exit the baggage claim and turn right, there is a huge "meeting point" sign. Surprisingly it's not on the official airport terminal map. If you look at this diagram at the sign pointing to the 'telephone' outside arrivals, follow that line to the edge of the line of the kiosk.

There's a vodafone kiosk right under the 'meeting point' sign as well, which will probably be easier to find. Alternatively, you can meet at one of the cafes that's on the map that are around the sign. All the cafes are overpriced though.