Memory and Storage
For storage, the WX390 provides a dedicated microSD card slot, allowing users to expand the device's storage capacity. While built-in storage is unspecified, the inclusion of microSD support was crucial during that era for users wanting to store media, albeit limited in scope by today's standards. The phonebook capacity accommodates up to 800 entries, a generous allowance for contacts. However, call records are limited to tracking only 10 dialed, received, and missed calls each.