Samsung SCH-R100DBAMTR - Manual (Page 52)

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Note: When you delete a Group, any assigned Contacts entries return to No Group.
Memory Info
The Memory Info menu option lets you view the amount of memory
you have used to store Contacts entries, as well as the memory
remaining to store more Contacts entries.
ᮣ From the Contacts menu, select Memory Info. The amount of
memory used and remaining (Free) for Contacts entries is
displayed.