Update Iphone to  new iOS 9.3 Update Iphone to  new iOS 9.3 Update Iphone to  new iOS 9.3 
 
 
 
Apple's
 iOS 9.3 looks set to be one of the biggest updates to iOS 9 yet, with 
improvements coming to several native apps, including Notes, Apple News,
 CarPlay, and more. There's also the addition of a long-awaited 
system-wide feature called Night Shift, which calmly tones down 
sleep-disrupting displays.
 
 The new iOS won't actually be available until sometime this Spring, but 
if you want to get your hands on the new features today, you can -- with
 the iOS 9.3 Public Beta.
It used to be the case that only registered developers could get hold of
 beta versions of the next iOS, but Apple's had a change of heart. Now 
anyone who wants to try out the latest beta can do so, and in this guide
 we'll show you exactly how. 
 
Of course, it's the nature of beta releases to be a bit buggy. That 
said, some users might not notice any major issues. On the upside, you 
can always downgrade your device and restore your device to the way it 
was before.  
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1. Take a backup of your phone
 
 
First
 you need to make a backup of your phone in case things don't work out 
and you want to revert to the previous version of iOS. Note that an 
iCloud backup isn't enough -- you need a full iTunes backup to perform a
 downgrade. 
 
 So, attach your iOS device to a computer with the latest version of 
iTunes installed and click on the device's icon in the app. In the 
device's Summary screen, under Backups, click This Computer, check the 
box to Encrypt iPhone backup (this is necessary to back up all your 
data) and click Back Up Now.  
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2. Archive the backup
 
 
The
 backup procedure takes a few minutes to complete. Once it's done, you 
need to archive the backup to ensure that iTunes doesn't overwrite it 
with backups of the new iOS. Windows users will need to manually archive
 the backup by moving it out of the default backup directory (see 
Apple's support website for more).
 
 To archive the backup on a Mac, select iTunes > Preferences from the 
menu bar and click the Devices tab. Right-click the new backup in the 
list and select Archive. A time and date added after the backup name 
verifies that the backup has been successfully archived.  
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4. Download Profile
 
Over
 on your iOS device, open Safari and type beta.apple.com/profile into 
the address bar. On the loaded page, tap the option to Download Profile.
 Once the beta profile has downloaded it will automatically open the 
Settings app on your device and ask you to confirm the installation.
Click Install and accept the terms and conditions. You'll then be 
prompted to restart your device.
 
 After the reboot, open Settings > 
General and tap on Software Update. Tap Install Now to download and 
install the latest beta version of the new iOS.  
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5. Look out for odd/slow behaviour or screens crashing
 
 
With
 the latest beta version of the new iOS installed on your device, the 
first thing you should do is check that everything's working in general.
 Interact with your device as you normally would and look out for 
odd/slow behaviour or screens crashing out. Apple's betas are usually 
relatively stable, but issues can arise.
 
 If you want to help Apple iron out bugs, you can use the Feedback app, 
installed as part of every beta. Beta software can also affect 
third-party apps, because developers won't have submitted their updates 
to the iTunes Store to ensure compatibility.  
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6. Check new features first
 
 
Of
 course, the reason you updated was to take advantage of the new 
features and improved Notes, Apple News, Health and CarPlay apps so be 
sure to test them out. Of particular note is the new Night Shift feature
 designed to reduce the amount of sleep-interfering blue light you're 
exposed to at night (similar in intention to third-party app Flux). 
 
You can find the new controls in Settings > Display and Brightness, 
and enable/disable the feature using the new option in the Control 
Center. Also check out new 3D Touch Quick Actions on several stock apps.
  
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7. Facing issues? Revert back to old iOS version
 
 
If
 you've experienced issues with the Beta -- apps crashing, poor battery 
life and the like -- it's easy enough to revert back to the previous 
version of iOS using your archived backup. 
 
First, go to Settings > 
iCloud and turn off Find My iPhone.
Now, connect your device to your computer and force restart it: Press 
and hold both the Sleep/Wake and Home button for at least 10 seconds, 
and don't release when you see the Apple logo.
 
 Keep holding until you see the iTunes icon on the recovery mode screen. 
In some cases you may need to repeat this process to get it to work.  
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With
 your device in Recovery Mode and attached to your computer, a dialog 
window should appear in iTunes. Click the 'Restore' button and confirm 
again when iTunes warns you that the device will be wiped.
 To open the 
iPhone Software Update menu, click 'Restore and Update.'
This will give you details on the latest official release of iOS; click 
Next and then accept the terms and conditions to begin the fresh 
install.
 When it's done, select the Restore Backup option in iTunes and 
choose the archived backup you created in step 2. Click Restore, allow 
the process to complete and you're done.
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