I will be in Mexico for 2 months. I will be using a Mexican SIM card in my unlocked phone, but I would like to bring a second unlocked phone with my Koodo SIM, only for incoming calls. This is because I may receive the very occasional call from Canada on this number. Is there a way to do this without paying the $40 per month roaming? I don't care about the rate per minute because I may not receive ANY calls at all and if I do, I will call them back on Skype.