1. Figure Out Which iPhone Models Would Be Able to Run iOS 8
Firstly, you should be aware of the iOS 8 compatibility with different iPhone models. Only iPhone 4S, 5, 5S and later devices are able to run iOS 8. If you are holding iPhone 4 and older versions, you can stop there and forget about the upgrading thing, however, you can think about updating them to iOS 7.
|Update iPhone to iOS 8|
Many users have reported the problem of iPhone contacts loss after upgrading to the latest iOS in the past. So another important step to take before iOS 8 upgrade would be getting into the habit of saving your important files on iPhone and learning how to recover lost iPhone contact and other data after iOS 8 upgrade.
Here we recommend iPhone Contents Recovery or iPhone Contents Recovery for Mac, a professional data recovery software for iPhone to backup iPhone data including contacts, text messages, photos, videos, call history, notes, calendar, Safari bookmarks, WhatsApp data and more before iOS 8 upgrade, the recovery program applys to iPhone 3GS, 4, 4S, 5, 5S, 5C, and even the coming iPhone 6, as well as the iPad and iPod.
Free download a trial version and have a try!
Note: Don't use your device and sync your device with iTunes after you lost data from it. Any operation on your device can generate new data, which can overwrite your lost data and make it unrecoverable.
Steps To Recover Lost iPhone Contacts After iOS 8 Upgrade
Solution 1: Directly scan and recover data from iPhone
Step 1. Connect iPhone to computer
Launch the program on your computer and connect iPhone. Choose "Recover from iOS Device" to brings up the recovery window.
|direct recovery lost contacts from iPhone|
iPhone 5S/5/4S users simply click "Start Scan" button to scan your iPhone. iPhone 4 and 3GS users simply follow the instructions shown on the picture below to get into the scanning mode.
Step 2. Recover lost contacts on your iPhone running iOS 8
iPhone Data Recovery will scan your iPhone to find all the existing and lost data. You are able to find and preview the target files easily by clicking the specific categories such as Contacts Messages, Photos, Videos, Memos, Calls, etc on the left side. Mark those files you want to backup or recover and click "Recover" button to export them to your computer.
If you can't find your lost contacts or other data via Solution 1, please don't worrry first, iPhone Data Recovery provides another two ways to recover your lost or deleted iPhone data from backup files.
Solution 2: Scan and extract iTunes backup to recover iPhone contacts
Step 1: Choose iTunes backup and scan it
Step 2: Recover deleted iPhone data
Tips: After recover data and save them on your computer, you can transfer the restored data from computer to iPhone again with iPhone to Computer transfer tool
|Extract to recover lost iPhone contacts from iTunes backup|
Solution 3: Scan and extract iCloud backup to recover iPhone cocntacts
Step 1: Choose the recovery mode and Sign in your iCloud
Step 2: Download and scan your iCloud backup
|Scan and extract iCloud backup to recover iPhone cocntacts|
How to Recover Messages from iPhone After iOS 8 Upgrade
How to Fix iPhone Stuck in Recovery Mode After iOS 8 Upgrade
Tips: As the same, the deleted data can be recovered with this iPhone Data Recovery, therefore, if you planning to resell, donate, recycle your iPhone, please remember to permanent delete all data from iPhone, to permanently erase your iPhone without recovery, we recommend you to use the iPhone Data Wiper.