After update a jailbroken iPhone to iOS 7,you may lost contacts on your iPhone. If your iPhone was jailbreak before,you can’t update your iPhone to iOS 7 directly with WIFI,it might cause your iPhone unable to run into the system,iPhone Stuck at the Apple Logo Screen. To upgrade a jailbroken iPhone to iOS 7, you must to use “Firmware Upgrade” your iPhone.

What’s means “Firmware Upgrade”? In a word, first of all,you need to download the iOS 7 version--“ iPhone3,1_7.0.3_11B511_Restore”,and then upgrade your iPhone via iTunes(the latest iTunes version).

Many iPhone users upgrade their iPhone 5, iPhone 4S, iPhone 4 to iOS 7 in “Firmware Upgrade”.However,they lost all data on their iPhone.What's more,you may lost iPhone contacts.How to restore contacts on iPhone?

To recover deleted contacts on iPhone.There are two effective methods that you can apply to get back those valuable files, depending on what resources you have on hand (whether you have iTunes backup or a good recovery software).

Method 1: Recover deleted contacts on iPhone using iTunes backup
If you have backed up your phone through iTunes after saving the contactss on your iPhone before syncing it, then you can use iTunes to restore lost data. Here's how:

Step 1 – Choose an iTunes backup file of your device to scan, and click Scan. The process will extract the content from your phone backup file.

Step 2 – Once the scan is finished, the screen will display the entire backup content extracted. Find your contactss — in .mpeg format typically — and click “Recover” to recover deleted contacts on iPhone.

Method 2: No backup? Just use a third party iPhone contacts recovery tool to recover deleted contacts on iPhone

Tips: To avoiding lost contacts on your iPhone,you must to back up iPhone contacts to computer,so that you never lost iPhone contacts.
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iPhone Data Recovery blogger

 

Hey,
You can try to use iPhone Data Recovery. It can scan your jailbroken iPhone deeply to find the deleted and lost data for you. You can preview them before recovering. Learn how to recover deleted data from jailbroken iPhone. It can recover messages, photos, videos, contacts, call history, notes, reminders, calendars, voice memos, voicemail, safari bookmarks, Whatsapp messages and other data from your jailbroken iPhone.

 

In this situation, you had better to use backup files to restore your lost data.
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