We are implementing MDM for our customer domain, we've got data quality issues in customer Phone Numbers.
Phone Number Data Quality Issues
1. Numbers without country code
2. Numbers with additional characters (e.g. '-','+','.','(',')')
3. Incomplete Numbers
4. Numbers with wrong country codes
Reltio phone cleansing operation by default considers every number as USA number unless country code is specified, and does not lookup with city/state/country to establish the validity. Above second issue is handled in our source to MDM integration process but others still exist. It would be great to know how bad phone numbers are being handled, Standardised, and enriched and best practices around in MDM.