How to use an iPad mini as an iphone?

I've seen here and there that is possible to use an iPad mini as an iPhone with pretty much the same capabilities but can you please indicate me what apps are there I should download to do that?

And also how can I use the iPad mini for making and receiving calls? Do I have to get some accessories like earphones or any stuff? I.e. How can I hear when it seems that the iPad mini is not geared with a hearing speaker at the top next to the camera?

I'm planning to get rid of my iPhone and use an iPad mini for all purposes. Is that possible?

HippoRemote
1. Launch iTunes by plugging your iPad into a USB port on your computer. Click the "iPad App Store" and search for "HippoRemote."
2. Click the download link to save the program in your iTunes library, and drag HippoRemote to your iPad. Eject your iPad and disconnect it from the USB port.
3. Click "System Preferences" in the dock on your Mac mini. Click "Sharing," and check the box next to "Screen Sharing."
4. Click "Computer Settings," and check the box next to "VNC viewers may control screen with password." Type in a password to use for establishing a connection between your iPad and Mac mini.
5. Tap "HippoRemote" on your iPad, and tap your computer on the HippoRemote welcome screen to connect over the Wi-Fi network. If you don't see your computer, ensure that both devices are connected to the same Wi-Fi network.
6. Tap the keyboard icon at the top of the screen to open a software keyboard controller on your iPad. Tap "ArrowPad," "NumberPad" or "Macros" to control the various functions of your computer. Wi-Fi Remote
7. Connect your iPad to a USB port on your Mac and enter the iPad App Store. Download "Wi-Fi Remote" and drag the program to your iPad. Disconnect your iPad.
8. Visit mbpowertools.net to download the Wi-Fi Remote companion application for OS X. Double-click the setup file to install the program. Launch Wi-Fi Remote on your Mac mini.
9. Launch Wi-Fi Remote on your iPad, and tap your computer on the welcome screen to connect the devices. Tap the mouse or keyboard icons to use the iPad's touch screen as a trackpad or text-entry device.
10. Tap any of the playback control buttons on the main screen to navigate DVD menus and start or stop playback. Snatch
11. Connect your iPad to a USB port on your Mac mini. Launch iTunes and download "Snatch" from the iPad App Store. Drag the program to your iPad and disconnect the device.
12. Launch Snatch on your iPad. Tap your Mac mini on the welcome screen to connect your iPad through Wi-Fi.
13. Tap "Launch Pad" at the bottom of the screen to see a list of the programs installed on your Mac. Tap a program to launch it, and tap "Tracking," "Scrolling" or "Keys" to use the various functions of the touch screen.

It will never have the same capabilities because its not a phone. You could get the celltower plan with it though and use apps to talk to people, then you could use it whether you are in Wi-Fi or not on Wi-Fi.

The iPad mini is not a phone. It will never be able to send or receive your voice calls.