What you do is you go and plug up ur iPhone to the iTunes and click on the update button
Yes the iphone 4 is better so you should upgrade to the iphone 4.
with the new 3.0 software update it is expected to be possible
iOS 6 is the software that was launched with the iPhone 5. You can run this software version on an iPod Touch (4th or 5th gen), any iPad except the original, and the iPhone 3GS, 4, 4S, and 5. You have only this summer to update to it if your device is eligible for an update to iOS 7 coming this fall. If you are running iOS 5, you can update to it from Settings>General>Software Update. If you are running any older iOS, you must plug your device into an iTunes-authorized computer to update. The update is entirely free by the way. You can see more about what features it brings on Apple's website.
Simply update ios
The iPhone 4 is now widely available but it has been very quickly superceded by the iPhone 4S.
I think the white iPhone 4 is believed to be coming out in January 2011.
Sonic 4 was released 7th October for iphone.
iPhone 6 release date is not far away because Apple will release iphone 6 at WWDC 2014 which is going to happern in June 2014.
it will not update and if it does it might lock your phone and you will not be able to use it.
depends if it has 4.os update
Yes, if you update it to iOS 5.1.1, there is an untethered jailbreak out.