I was with Telus and now Koodo. I also switched from iPhone to Samsung. I am now not receiving sms from friends with iPhones. Their phones keep trying to send an iMessage - even if they have changed my mobile from iPhone in their contacts. Do I need to change something within my account? I checked under phone in my account and it says unknown. I cannot make the change through change phone options as my sim is entered and it wants me to change that first. But it lists my current sim. When I swtiched they transferred my account from Telus. Most conversations in this group are people switching to an iPhone.