Cannot dial 611 from Samsung phones | Phone/Device Issues and Features | Consumer forum

Three phones: One Samsung Galaxy SII purchased unlocked, a Samsung Corby Pro locked on Rogers (with a Speakout SIM in it), and a generic Hong Kong Win Mobile 6.5 phone. With the Speakout SIM in it, neither of the Samsung phones will allow me to call the Speakout 611 number, but the WM phone will do it (all using the same SIM each time). I had seen a similar problem with the SII, I cannot access my Rogers voicemail with it when the Rogers SIM is in it.