Which one of the following tabs has a SIM slot for voice calling?

[rudrax]

http://www.amazon.in/dp/B00NBS53JG/ref=twister_B00O1TXER2#productDetails

http://www.compuindia.com/catalog/product_compare/index/

http://www.flipkart.com/dell-venue-8-16-gb-tablet/p/itmdtammsye7rxhh

[mazigh]

Check this: http://www.gsmarena.com/dell_venue_8-5752.php

I do believe the amazon version supports SIM slot for voice calling as it mention 3G, the flipkart version seems to be the WIFI version, for the second link you provided it doesn't open in chrome, opened it in Firefox but nothing special just sth related to Dell Ad

Edit: Checked the amazon version and it clearly states there is no voice calling, so it seems both versions are not for voice calling