upgrading from iOS 4.3 to 5.1

Discussion in 'iOS 5 and earlier' started by mattburley7, Mar 12, 2012.

  1. mattburley7 macrumors 68030

    Oct 13, 2011
    so i am going to be updating my friends iPhone from 4.3 to 5.1 on thursday and am worried about losing any important information such as contacts because this will wipe the phone clean. will itunes backup save this information and be able to put it back on the phone?
  2. Intell macrumors P6


    Jan 24, 2010
    An iTunes backup will save this information. iTunes should backup the device before updating it to iOS 5.1.
  3. mattburley7 thread starter macrumors 68030

    Oct 13, 2011
    ok so i dont need to save the contacts on the computer. from iOS 4.3 you can only do a restore install correct or can u do upgrade? Its been awhile since upgrading everyone from 4.3 to 5.0
  4. callmemike20 macrumors 6502a


    Aug 21, 2007
    I use an app called PhoneView, which I believe I got from a MacHeist bundle a few years ago. It lets you copy files from your iPhone onto your hard drive as a backup. Every time I do a restore, I make a backup of my contacts just in case.
  5. mattburles, Mar 12, 2012
    Last edited: Mar 12, 2012
  6. mattburley7, Mar 12, 2012
    Last edited: Mar 12, 2012

    mattburley7 thread starter macrumors 68030

    Oct 13, 2011
    is it better to restore or upgrade my friend from ios 4.3 to 5.1? If I do restore will the contacts still be there as long as I do a backup on iTunes?
  7. Intell macrumors P6


    Jan 24, 2010
    To get from iOS 4.x to 5.x, iTunes restores the device. It doesn't upgrade it. Before iTunes restores 5.x I to the device, it should back up your device and automatically restore it from the backup when it's done putting iOS 5.x onto it.
  8. barredfreak macrumors 6502

    Jan 9, 2012
    Do you know that really long period of time Apple takes before it actually starts syncing to your device? Yep, that's the backup.
  9. jimthing, Mar 13, 2012
    Last edited: Mar 13, 2012

    jimthing macrumors 65816


    Apr 6, 2011
    London, UK
    To answer this properly.

    - Plug iPhone into computer with iTunes open.
    - If the pop-up saying new software available pops-up: hit cancel.
    - Hit the Sync button in iTunes (this SYNCS data missing on iTunes on your computer & vice-versa, and BACKS-UP the device).
    - When that's finished, hit the install of the iOS version (5.1) update again: this takes a while to download and a while to complete whole installation process
    (- as part of this installation process, the final bit of it involves the data/settings from the previous backup it did above, then being installed on the new OS. So everything should be back to how it was before you updated the iOS software.)
    - Finally check all is OK, and just hit the eject button in iTunes next to your iPhone.

    So you shouldn't have to do any special backups yourself, as iTunes does that every time you connect it to you computer and sync, anyway. If something goes wrong, you can always get the backup saved in iTunes on your computer to reinstall everything how it was previously.

    - Post-5.x being installed, from then on you can install new "delta" iOS updates directly on the iPhone without plugging into computer (via Setting > General > Software Update). These will be quicker than before (where the WHOLE new operating system had to be installed on the device [plugging iPhone into computer still does this as post-5.0, as a just-in-case option Apple have left in place]), as deltas are essentially just the small *extra* bits for the new functions that are on the OS updates.

    From 5.0, you have two more options for sync/backup...
    - Firstly, you can choose to sync to either you Computer or iCloud.
    - Secondly, you can choose to sync over USB or Wi-Fi (the latter, only when iPhone plugged-in to power).

    Hope it helps.

    I have to say, all this "data management" is starting to be right pain to deal with, and the iCloud options are half-baked.
    eg. Can't buy more than just 50GB (+5 free = 55GB total), even though I have a device that stores nearly 64GB, and expensive per GB anyway at £1.40/US$2.00 per GB per year!** So currently makes user decisions more complicated than they should be on just what gets stored where.

    ** for comparison, I just bought a WD 6TB (2x3TB) for £350 = £0.05833/GB (yes just **6 pence** per GB, and not just for one year either!).
    (this one [but cheaper from non-Apple supplier!]: http://store.apple.com/uk/product/H5857Z/A/Western-Digital-6TB-My-Book-Studio-Edition-II .)

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