Is it possible to send EMOJI / emoticons characters?
Yes, EMOJI / emoticons characters are supported as part of the UNICODE standard.
Note:This applies only to MT messages. Additionally, these characters are only be supported on select Operators that support UCS2, namely Verizon Wireless, AT&T and T-Mobile. Sprint does not support EMOJI / emoticons characters.
Ensure the data coding schema (DCS) used is UCS2, when encoding the messages and that you understand the constraints that UCS2 encoding introduces to the message and message length.