I recently bought a Nexus 5 from Google and would like to use my existing Koodo SIM card from my old phone in this new phone. I inserted the SIM card without issue. I am able to make and receive phone calls no problem. Sending/receiving SMS with Hangouts is also no problem. However, I've noticed that I cannot send or receive MMS. I checked APN settings, but they seem to be fine. I tried to use the Swap Phone feature in Self Serve to notify Koodo that I have a new phone, but when I select "Upgrade" my existing phone and insert my current SIM #, I get the following error message: "Sorry, this equipment (*******[sim number]) is already in use." I don't understand -- can't I use my existing SIM in my new phone? I only intend to have one phone on my account.