What characters can I use in my text messages? Brad Down Updated September 07, 2015 00:59 Follow We support the GSM character set and UTF8 character encoding. http://en.wikipedia.org/wiki/GSM_03.38 http://en.wikipedia.org/wiki/UTF8 You can use any of these characters in your message, if you use a character outside this set it will not appear. Related articles Short Codes...How do you get them? How much are they?