Custom person-scoped fields marked as unique for merging can be used as additional matching criteria in Consolidate Records. To match on mobile phone number, create a custom field to store a normalized phone value, then use a rule to populate that value from the person mobile phone number.
📝 Note
Only use a phone value as unique for merging when it fits your institution’s duplicate review practices. Shared household phone numbers, recycled phone numbers, and international number formatting can affect match quality.
⭐ Get Inspired
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Create the custom field
Go to Database → Fields.
Create a person-scoped field to store the normalized mobile phone value.
Set Unique for Merging to Value contains a unique ID which identifies a single record for merging.
Select Save.

After creating the field, refresh the Fields cache, the Configurable Joins library, and the template library.
Create the rule
Create a rule that sets the custom Mobile ID field when a mobile phone number exists.
In the rule action, configure the custom field with Replace Values from Formula.
Add an export for the mobile phone number and rename it to a friendly variable, such as
Person-Mobile-Phone.Edit the export and set Format Type to Formula/Custom SQL.
Use
@valin the formula and remove common phone number formatting characters.
replace(replace(replace(replace(replace(replace(@val,'-',''),'(',''),')',''),',',''),'+',''),' ','')

Try a Slate example 💼
Copy this Suitcase ID and paste it in Database → Suitcase Import to import an example Mobile ID rule:
8375ac55-31a8-4610-825d-0092111154bb:slate-kente-testRefresh existing records
After the rule is active, run a retroactive refresh for the records that should receive the normalized Mobile ID value.
Review duplicate matches
After records have Mobile ID values, go to Consolidate Records. When duplicate values exist, a Mobile ID section appears under Persons, similar to the standard Email matching section.
