I moved abroad from Canada to Brazil and I want to use my chip from Brazil in my Samsung Galaxy S730M, but I just cannot pull out the SIN card that is already on it. Is there a proper way to do it?
Henrique, why is it that you can't just pull out the SIM card that is already inserted in your Samsung Galaxy Discover? It should be possible to do so, easily. Try sliding out the SIM card from the SIM card slot after removing the back cover and the battery of your phone. You can find Samsung's official instructions for inserting a new SIM card on the Samsung Galaxy Discover right here.