Memory and Storage
While the Philips 639 is limited by modern standards, with an internal storage of just 1.5 MB and no additional card slot for expansion, it suffices for storing essential contact details and a call log. The phonebook can accommodate 299 entries, each with up to five fields, while call records can track up to 30 received, dialed, and missed calls. This reflects the phone’s focus on core communication functionalities rather than multimedia storage.