to use your voice control you hold down the squere button on the front of your iphone and once youve done that it will come up with voice control ask it anything u like
Hold down the Home Button to Launch Voice Control!
If you mean IPhone 4S the difference is that 4S has Siri, which is like a voice assistant on your phone.
Because the iPhone 3G was a old original iPhone that didn't have alot of things like voice control and video taking .the 3GS doesnt a front camera ethier it was envenomed when they made the 4/4s
The iphone 4 does have voice control. To activate it simply hold down the home button until you hear the tone.
No you both have to have an iphone 4 :)
yes
No, there is although an iPhone case for the 4 that has a keyboard that plugs and you can use.
The iphone 4s desigh as same as iphone 4, so you needn't worry about that ,my girl friend's iphone 4s use my iphone 4 case (buy form 708buy.com) all the time, I prove the iphone 4 case is fit to 4s
A 4g phone is a lot faster than a 3g and it's a lot clearer.
Yes I Use it every day it is my lock screen on my Mac and IPhone 4
No. It is not possible to use 2 apple ID's simultaneously on apple iPhone 4.
Soon after the iPhone 4 was released in June 2010, Apple fans began wondering about the iPhone 5. In October 2011 Apple announced and released the next version of the popular smartphone, the iPhone 4S. The main difference between the iPhone 4 and 4S is the addition of Siri, a voice-activated personal assistant. The 4S also boasts a Dual-core A5 chip, as opposed to the iPhone 4's A4 chip. The camera on the 4S has 8 megapixels compared to the 5 megapixel camera in the iPhone 4.