Expandable memory � support for microSD card
Bold x
8900 x
Tour x Expandable memory � support for hot swappable microSD card, SDHC supported
Bold x
8900 x
Tour x Onboard memory
Bold 1 GB
8900
Tour Flash memory
Bold 128 MB Flash
8900 256MB
Tour 256mb
Flash memory is used for device software and applications. It used in much the same way as RAM memory in your computer.
Expanded memory is contained on a separate microSD card. It is not directly addressable and usually used to file storage. It functions much like the Hard Disk Drive in your computer.
Finally, On-board Memory. This has only used on Bold, it appears there is 1 Gb of memory installed, of which 128 Mb is used for Flash Memory and the remainder used as Expanded memory, but on a fixed internal chip.