Ok, I will admit I have never heard of Emoji (“Picture Characters”) until it was announced that iPhone firmware 2.2 would support them. As it turns out, however, the only iPhones that were blessed with this feature were on Japan's SoftBank network. Until now that is...
Important Note: If you are not familiar with editing code we here at TiPb do not recommended that you try this.
No matter what carrier you are with, you can now apply a hack that was found on Gizmodo that will enable Emoji emoticons. Keep in mind any iPhone will be able to display the icons hacked or not, while "other" phones out there need to support Emoji in order to display them.
blockquote>You need to edit the file /User/Library/Preferences/com.apple.Preferences.plist on the device -> whether you use a jailbreak to achieve this or merely some iTunes backup editor is up to you. Add the following boolean key as ‘true’: KeyboardEmojiEverywhere. Then merely go to the Keyboards section of the Settings app, hit Japanese, and turn on Emoji. Will work for any text field/view in the OS, including on websites, AND including the titles of items on SpringBoard (e.g. if you save a bookmark to the home screen).
The easiest way to do this would be to Jailbreak and run your iPhone as a SFTP server for editing the config file. Again TiPb does not recommend you try this if you are not familiar with editing code.