BT HALO User Manual page 31

Memory Status
Display the number of contacts in all contact lists i.e. Home phone and both
paired devices. Total number of 'numbers' allowed are: 1000 for each list. Please
note this limit is for phone numbers and not contacts as some contacts may have
multiple phone numbers.
* Please note: When using these options, it may take up some time.
When importing or removing contacts and the process is complete, your Halo
will display a success message, but will still need to synchronise with the base
and other handsets. As a result some functions may not be available until
synchronisation is complete.
Contacts 31 31