Designed to unlock operator locked phones - Simply slide the attachment under your normal SIM card - Ultra-thin film-like design minimizes and sometimes avoids the need to cut and trim SIM cards - Manufacturer claims that this also works on some models of the following phones: Alcatel BlackBerry Foma Huawei Iphone LG Lobster MDA MODEM Motorola Nokia Panasonic Sagem Samsung Sharp Siemens SonyEricsson SPV Toshiba Vodafone ZTE DOCOMO SOFTBANK - Note: this is a DIY part and DX did not manufacture the product. Please research on Google to check if the unlocker is compatible with your phone.