Hi, I am currently considering to get an iphone 4 but only if it could be used for voice calling using 3g such as skype or fring. Must I jailbreak the phone to do this or these apps works fine for voice calling using 3g? If not, any other apps that could do this? Thanks 
				
			

 
 
		 
 
		 
 
		 
 
		 
			
		 
			
		 
			
		 
			
		 
			
		 
			
		 
			
		 
			
		 
			
		 
			
		 
			
		 
			
		 
 
		 
 
		