Phone applications are improving every day now offering high resolution pictures, gaming, MP3, video. In order to answer the demand created by those new features, the content offer is booming. In this new context, the best way to upload, carry, write, and transfer any kind of content on the phone is a Polaroid Micro SD flash card. Please verify that your device such as cellular phone or digital camera supports SDHC cards. SDHC cards are not compatible with standard SD host devices and card readers, and will only work on SDHC host devices. Check with your device manufacturer to see if the device supports SDHC before purchase.