Samsung has claimed that it has developed a 2 GB MMCmicro flash card for cellphones. Capable of carrying about 400 digital music tracks, the tiny storage device is the fastest and highest capacity memory card for mobile phones, according to Samsung.

The 2GB MMCmicro card is about the size and shape of one key on a standard computer keyboard and just .04 inches thick. It can store as much as 12 hours of "mobile video," Samsung said, without specifying a format.

It can also transmit data quickly. A user can download three hours of mobile video, for example, in less than two minutes, according to Samsung. The cards can read data at 10 megabits per second and write at 7 mbps, the Seoul-based company said.