How to Recover lost Contacts from iPhone 5S?

Help! All contacts on my iPhone 5s was lost when I update to iOS 7, I haven't backed up to iTunes before, how can I recover lost contacts from iPhone directly without iTunes backup, after upgrading iPhone to iOS 7?

There are many data stored on your iPhone devices, when you deleted some by accident, you can still recover lost data of iPhone unless you have backup your iPhone with iTunes.There're two way for you recover iPhone data: Recover iPhone data directly;extract and restore iPhone data from iTunes backup files. So, it is highly recommend to have a regular backup for your iPhone, if backup, all of your data is still there, with iPhone Data Recovery, you can easily extract backup from your iTunes.

If you don't have your iPhone backed up, than it is quite difficult for you get your iPhone contacts. However, in the future simply create a backup of your iPhone by connecting it to your computer and selecting 'Back up now', while having 'This Computer' option selected. To ensure integrity of your data I recommend that you also use a back up recovery software which will let you explore and archive your iPhone's data. Take a look at Total Saver and see if that helps
http://www.myphonedata.com/products/totalsaver

What you need is a professional iPhone 5S data recovery software.

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