We definitely want to get this figured out for you ASAP. Please, send us a private message with your phone number, PIN code, MEID/IMEI of the device that you would like to activate, and the ICCID/SIM card number.
Hi there, @Evelinbravo! Are you getting any specific error message? What's the make and model of the phone that you are trying to swap? Where did you purchase that phone?