Change Sort Order of Contacts in Iphone.

How to Change the Sort Order of Your Contacts 

• Open Settings.
• Tap Contacts.
• Select Sort Order.

• In the screen that appears, the default of Last, First is selected. To change the order, select First, Last. The order of your contacts will then be according to first name.
• Similarly, you can go back one screen to change the display order. Within Contacts, tap Display Order.

• Select the option Last, First. Your contacts will now display with the person's last name appearing first.

  

Note that since Chinese, Japanese, and Korean names have a fixed order, the order of those names won't change.

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