Compatible Phone Models;

For Micro SD:

Blackberry: 8100 Pearl, 8800
HTC: 3125, 8525, Dash
LG: CU500, LX-550 Fusic, enV VX9900, VX8500, VX8600, VX8700, VX9400
Motorola: V3i, V3r, V3t, V3xx, KRZR K1/K1m, SLVR L7/L7c, RIZR Z3
Nokia: 6315i, 5300
Samsung: a707 SYNC, i607 BlackJack, D807, T519 Trace, T629, T809, SCH-A930, SCH-A990, SCH-U620, SCH-U740, M620 UpStage, SPH-M500

For SD:

Samsung SCH-i730/i830, Treo 650/680/700p/700w

The SD Card is a highly secure stamp-sized flash memory card. It is Perfectly designed for next-generation mobile phones and portable devices. The SD Card can be used in a variety of digital products. It has 2GB storage capacity and high transfer rate for fast copy or download. You can have a huge amount of storage waiting for you in a convenient, easy-to-carry size and format. It provides selectable mechanical write protect switch on the exterior card casing. It supports Built-in Error Correcting Code (ECC) to detect and correct transfer errors. At the same time ,it has 100% compatiblity with all SD-compliant devices. So you can use it without any extra trouble.