iPhone users can now assign text tones to their contacts and take personalization of their phone to the next level. By default all the contacts are assigned the default ringtone and default text tone. If you want to assign a special text tone for someone special, you need to follow a few easy steps.
Tap the Phone icon and go to Contacts
Select the Contact you want to assign text tone to.
Scroll down and locate the text tone option and tap on it. You will get the option to select a text tone and also buy a text tone if you wish to get a new text tone apart from the ones already present.