Earlier, I mentioned about how you can enable Emoji icons, which are picture characters for text messaging, on firmware 2.2 by download a package from Cydia. This approach only applies to jailbreak iPhone.
For those of you who do not have iPhone jailbreak, winandmac.com published a method to enable Emoji icon on non-jailbreak iPhone.
Here are the procedures:
Step 1. Download the vcard.vcf here.
Step 2. Import it to your address book program. If you are using Windows, you may want to do it on iPhone directly. Send the vcard.vcf file to yourself. Open in on iPhone?s Email.app, click the vcf file and import all the contacts.
Step 3. Go into ?Settings? > ?General? > ?Keyboard? > ?Japanese Keyboard?. Enable the QWERTY keyboard.
Step 4. In notes or any other program you want. Type ?emojia?, ?emojii? or ?emojiu? to select those icons.
Step 5. Happy Emoji!
For jailbreak iPhone user, you can refer to this post to enable Emoji icons on iPhone 2.2.