Memory and Storage
Regarding memory, the OT-S850 was quite limited. It had no card slot for expandable storage, which constrained users to only the internal 3 MB of space. This could have been challenging considering its capability for photo call in the phonebook feature and storing call records of up to 10 dialed, 10 received, and 10 missed calls. Such a storage arrangement meant that users would have been required to frequently manage their phone's data, something that may feel cumbersome against the backdrop of modern smartphones with substantial gigabytes of storage.