hold * key (when typing a txt) until the symbols come up, then used the arrow up & down keys to select the page that you want until you find the * and # symbols, then press the number which is next to the symbol that you want...
Its a waste of characters with o2 constantly putting *0# before the message. Last time i sent a text with them it took 5 hours to deliver, the recipient was on o2 too and their phone was switched on. Terrible service sometimes