How to make phone calls using iPad?
Making phone calls using iPad is possible using VOIP applications like TruePhone, Yahoo Messenger, Skype, etc. Viber won’t work as there is no iPad version, but I did try installing the iPhone version on iPad and I could activate it.
Now let us talk about a real application for iPad to make phone calls, but this will work only if you have your iPad Jail broken. I hate Jail breaking, but I had done earlier where there was no copy paste and some basic features missing.
Make Phone calls using PhoneIt-Ipad
This application is costing US$ Cydia and to use it you have to Jailbreak your iPad. You need a data connection to make phone calls and send SMS. This does not work with iPad 2, so make sure that you are not trying to activate the account for an iPad 2. You need to use headphones or speaker phone, does NOT support bluetooth headsets.

Problems with such applications are that when you go for an upgrade to a better version of iOS, you will have to wait till the update is Jailbroken and the software is updated for that version. iOS 5 is coming and if you are planning for an upgrade, then you may have trouble using this software.
Anyway, if you desperately need an application on your iPad to make phone calls, then you can go for this.
