The UnlockMySIM sticker is compatible with any GSM or CDMA iPhone including the iPhone X which uses a nanoSIM or 4G iPad and currently the latest version of iOS.
At the present time, UnlockMySIM is not compatible with other makes as they do not use a nanoSIM. A microSIM adapter is required for models prior to the iPhone 5.
Visit the doctorSIM Shop to buy your UnlockMySIM sticker and use your iPhone on the network of your choice.