Upgrade iphone ios 4 to ios 6 - Cell Phones

iPhone 4 is not eligible for an upgrade to iOS 8 due to Apple's restrictions. Only the 4S and up are eligible.

Farewell iPhone 4 No iOS 8 upgrade for you ZDNet

Article published about same time question posted, so probably redundant resposnse. Farewell iPhone 4 No iOS 8 upgrade for you ZDNet

to update to iOS 5 is only possible on iPhone 3GS / 4 / 4S with connecting the device to iTunes on a computer.
- Plug the iPhone to your computer and open up iTunes under devices click on your iPhone and then click on check for update.
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latest iOS possible:
iPhone 1 = iOS 3.1.3
iPhone 3 = iOS 4.2
iPhone 3GS = iOS 6.1.6
iPhone 4 = iOS 7.1.2
iPhone 4S = iOS 8.1.2
iPhone 5 = iOS 8.1.2

IOS 6 is possible only on iPhone 3GS / 4 / 4S !
- There are two ways to upgrade the iOS version of your iPhone, iPad, or iPod Touch - via connecting the device to iTunes on a computer
- or directly from within the device, but only since iOS 5, it is possible to upgrade the iOS version without the need to connect the iOS device to a computer (over-the-air update)
just go to: settings - general - software update
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There are two ways to upgrade the iOS version of your iPhone with connecting the device to iTunes on a computer
- or directly from within the iPhone, but only snce iOS 5, it is possible to upgrade the iOS version without the need to connect the iOS device to a computer (over-the-air update)
just go to: settings - general - software update

IOS 6 is possible only on iPhone 3GS / 4 / 4S
- There are two ways to upgrade the iOS version of your iPhone
- via connecting the device to iTunes on a computer
- or directly from within the device, but only since iOS 5, it is possible to upgrade the iOS version without the need to connect the iOS device to a computer (over-the-air update)
just go to: settings - general - software update

IOS 6 is possible only on iPhone 3GS / 4 / 4S
- There are two ways to upgrade the iOS version of your iPhone, iPad, or iPod Touch - via connecting the device to iTunes on a computer
- Plug it into your computer and open up itunes under devices click on your iPhone and then click on check for update
--------------------------
- or directly from within the device, but only since iOS 5, it is possible to upgrade the iOS version without the need to connect the iOS device to a computer (over-the-air update)
just go to: settings - general - software update
---------

All you have to do is connect your iphone to a computer with itunes installed. After that it will notify you that you have outdated software and need to upgrade. You won't be upgraded to ios 6 as it is not at 7.0.4.

If your problem concerns your iPhone 3GS (your cellphone), then no, you cannot upgrade it to IOS 7. IOS7 requires an iPhone 4 or newer (4, 4S, 5, 5C, 5S).

If your problem is about your iPad (your tablet), then you can't upgrade if it's an iPad 1. IOS 7 is compatible with the iPad Air, 4, 3, 2, mini and mini with retina display but NOT with the iPad 1.