NOTE If you see Delete Other Profiles rather than Delete All Profiles, you have linked contacts that come from accounts whose info you can't change on your device (like Facebook and LinkedIn). Tap it. To delete any remaining profiles, go to the account online using your computer and delete them there.
If you delete a contact that is assigned to an online account, the contact is deleted in the online account also.
Customize Contacts
1Open Contacts 
.
2Open the application menu and tap Preferences & Accounts.
3Set the following options:
List Order: Tap to select the criteria by which the contact list is sorted. If you select Last name to sort on, the names are alphabetized by last name, but they still appear in the Contacts list as first name followed by last name. If you select First name to sort on, names are alphabetized by first name.
1Contact list sorted by first name
2Contact list sorted by last name
You can also choose to sort by Company & first name or Company
&last name. In these cases, the company name is alphabetized, and within the company, whichever you choose, the names are still listed as first name followed by last name.
Default account: Tap the current default account to change the default to another account. New contacts you create are assigned to this account unless you specify otherwise.
Accounts: Tap an account to change login settings and sign in using the new settings.
Add an account: Tap, and then tap an account type. Enter the account information. Before you can set up an account on your device, you must already have an account online with the provider.
Sync Now: Tap to manually synchronize your online accounts (see Manually synchronize Contacts with your online accounts).
4 Tap Done.
Manually synchronize Contacts with your online accounts
If you want to get contacts from an online account on your device immediately, or upload contacts from your device to the online account, you can do a manual sync. This synchronizes Contacts with all the accounts you have set up on your device, and it syncs all other apps associated with all online accounts that you selected for synchronization.
1Open Contacts 
.
2Open the application menu and tap Preferences & Accounts.
3Tap Sync Now.
Delete an online account from Contacts
If you synchronize contacts with an online account, deleting the account from Contacts stops synchronization of contacts
100 Chapter 9 : Contacts, Calendar, and other personal information