All cellular phones that support Micro SD will use cards up to 2GB but if you will be not sure whether you could use Micro-SDHC memory card 4GB and above make sure you check either with us or with your cellular mobile phone manufacturer before buying. Micro SD cards had been originally called T-Flash and then Trans Flash before being rechristened as micro SD when adopted by the SD Card Association (SDA). Like its name, the micro SD card / TransFlash is essentially an SD card, but in a smaller sized package (the dimensions of the fingernail). It is one from the smallest removable flash memory card formats designed particularly for tiny devices. Some of thse devices consist of: cellular phones, handheld GPS devices, moveable audio players, flashcards for Nintendo DS emulation, and expandable USB flash memory drives.