Your phone supports the use of an optional SD card (not included) to expand its storage capacity. Some cards may not operate properly with your phone.
SD Card Cautions
Data: Information stored on an SD card can become lost or changed accidently or as a result of damage. It is recommended that you keep a separate copy of important data. Sprint is not responsible for damages from data that is lost or changed.
Reading/Writing Data: Never power off or remove the battery while reading or writing data.
Battery Level: A low battery charge may prevent reading/writing to an SD card.
Handling SD Card: Use/store SD cards away from the reach of infants. SD cards may cause choking if swallowed.