Designed to unlock operator locked Nokia 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 S onyEricsson SPV Toshiba Vodafone ZTE DOCOMO SOFTBANK