How to update iphone 4 from ios 4

Dear iphone users,
I currently have iphone 4 with ios 4.2.1. and I would like to update my ios to latest ios.
As I have understand, it is neccessary to update it first to ios 5, and then to ios 6.
Could you please explain me step by step procedure on how to do that?
Should I do it with iTunes and how?
Thanks in advance

Connect to iTunes on the computer you usually Sync with and “ Check for Updates “...
See the Using iTunes Section Here...
How to update your iPhone, iPad, or iPod touch

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My daughter has bought a 3gs which is currently running 4.1. Can it be updated any further and how would she do this? when the phone is plugged into iTunes and we click the update button is just says iTunes is running the latest version and doesn't update the phone.
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   2. iPhone Support
   3. iPod Touch Support
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     a. Updating Your iOS to Version 6.0.x from iOS 5
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i had a problem when i update iphone 3gs from ios 5.1.1 to 6.1. How could i fix it?. I can active my phone?help me, please!

Well we need to know what your problem is if you want someone to offer a solution for you

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Plug it into your computer running iTunes and click the check for updates button if you're not prompted to update it automatically.
You must be running iTunes 10.7 on your computer.

How to update Ipad 2 from IOS 4.3.5 to IOS 5. Itunes won't let me do it because it keeps showing error messages asking me to check if my network is active.

how to update Ipad 2 from IOS 4.3.5 to IOS 5? Itunes won't let me do it because it keeps showing error messages asking me to check if my network is active.

If you have an iPad 1, the max iOS is 5.1.1. For newer iPads, the current iOS is 7.1.2. The Settings>General>Software Update only appears if you have iOS 5.0 or higher currently installed.
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http://support.apple.com/kb/HT4972
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http://www.macworld.com/article/2010061/hands-on-with-ios-6-installation.html
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If you are currently running an iOS lower than 5.0, connect the iPad to the computer, open iTunes. Then select the iPad under the Devices heading on the left, click on the Summary tab and then click on Check for Update.
Tip - If connected to your computer, you may need to disable your firewall and antivirus software temporarily. Then download and install the iOS update. Be sure and backup your iPad before the iOS update. After you update an iPad (except iPad 1) to iOS 7.x, the next update can be installed via wifi (i.e., not connected to your computer).
Tip 2 - If you're updating via wifi, place your iPad close to your router to preclude getting a corrupted download.
How to Upgrade to iOS 7
The iOS 7.0 update requires around 2.5 GB of storage space, so if your iPad is almost full, you may need to clear up some space. You can check your available space in Settings -> General -> Usage.
There are two ways to upgrade to iOS 7: You can use your Wi-Fi connection, or you can connect your iPad to your PC and update through iTunes. We'll go over each method.
To upgrade using Wi-Fi:
Note: If your iPad's battery is under 50%, you will want to plug it into your charger while performing the update.
Go into the iPad's Settings.
Locate and tap "General" from the menu on the left.
The second option from the top is "Software Update". Tap this to move into the update settings.
Tap "Download and Install". This will start the upgrade, which will take several minutes and will reboot your iPad during the process. If the Download and Install button is grayed out, trying clearing up some space. The space required by the update is mostly temporary, so you should gain most of it back after iOS 7 is installed.
Once the update is installed, you may have to run through the initial steps of setting up your iPad again. This is to account for new features and settings.
To upgrade using iTunes:
First, connect your iPad to your PC or Mac using the cable provided when you purchased your device. This will allow iTunes to communicate with your iPad.
You will also need the latest version of iTunes. Don't worry, you will be prompted to download the latest version when you launch iTunes. Once it installs, you may be asked to setup iCloud by logging into your iTunes account. If you have a Mac, you may be prompted on whether or not you want to enable the Find my Mac feature.
Now you are ready to begin the process:
If you upgraded iTunes earlier, go ahead and launch it. (For many, it will launch automatically when you plug in your iPad.)
Once iTunes is launched, it should automatically detect that a new version of the operating system exists and prompt you to upgrade to it. Choose Cancel. Before updating, you will want to manually sync your iPad to make sure everything is up to date.
After canceling the dialog box, iTunes should automatically sync with your iPad.
If iTunes doesn't automatically sync, you can manually do it by selecting your iPad within iTunes, clicking on the File menu and choosing Sync iPad from the list.
After your iPad has been synced to iTunes, select your iPad within iTunes. You can find it on the left side menu under Devices.
From the iPad screen, click on the Update button.
After verifying that you want to update your iPad, the process will begin. It takes a few minutes to update the operating system during which time your iPad may reboot a few times.
After updating, you may be asked a few questions when your device finally boots back up. This is to account for new settings and features.
 Cheers, Tom

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Hello teams,
I tried to update my iPhone 4 (iOS 4.3.3) to iOS 5 and it seems I lost everything after the update. (calendar, notes, contacts, sms history, photos and music).
I hope you can help me to retrieve my data.
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Started iTunes, connected my iPhone.
I observed an informal pop up telling that a new update was available for iPhone (iOS 5).
I clicked on "Yes" to execute the update and the downloading process started.
iTunes asked to update purchased items from iTunes first. I accepted and I waited until iTunes finished the downloading process of purchased items.
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After 15 min, the iPhone needed some answers to setup questions (location service, ...).
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On iPhone, the restoring process with the battery picture was 100%.
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How can I transfer all my data (from my iPhone before the update) to my iPhone (with iOS5) ?
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How to update iphone 4 from ios 4

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