Is that available in Europe only or something? I'm in the US and I do not have a native dialer app.
US carriers generally don't like devices that do everything all in one. That's why for tablet devices which, around the rest of the world, can make a normal phone call (without having to do anything special, or use 3rd party apps), when those "same" tablets make it here to the US of A, it's a gimped version of the device which has been stripped of its normal phone calling abilities. That's why some of us (myself included) import from overseas, while giving carriers the middle finger in the process.
So, why are carriers over here opposed to a tablet that can make regular phone calls? Simple: money.
If you have a tablet which double's as your phone, then you only have to pay for one line subscription. But if your tablet has had its phone calling abilities stripped away, then you're forced to carry a phone with you. Now, either you're now forced to pay for a line subscription to BOTH your phone AND your tablet, or you're forced to pay for the one line subscription to your phone, plus an additional fee to tether your tablet up to the phone. Not to mention, you've had to buy two devices instead of one.
Either way, you're forced into a particular buying behaviour, by being offered strategically limited choices, and the carrier profits more from it.
So, screw the carrier's profits, buy unlocked overseas, drop your 2-year slave contract, and port your number to an unlimited everything pay-as-you-go plan for about $50/month instead! (GoPhone and Straight Talk are both ideal options for unlocked GSM devices for 3G compatibility)