Memory and Storage
The internal memory of the Siemens C75 is limited to 10MB. While this might seem minimal now, it allowed the device to store 1000 contacts in the phonebook with up to 20 fields each, along with photographic caller ID functionality. The call log could track up to 100 received, dialed, and missed calls. There is no card slot for memory expansion, reflecting the phone's focus on core communication functions rather than multimedia storage.