How to Remove Duplicate Phone Numbers in Excel (with Country Codes & Format Standardization)

Essential skills for marketing/customer service list cleaning: standardize phone number formats, handle country codes, and keep the latest records. Supports standardization of various formats like +86 138-0000-1234, 13800001234, 086-13800001234.

August 18, 2025

2 min read

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Merge Multiple Customer Lists and Remove Duplicates (Downloadable Template Included)

Professional guide for multi-channel customer list merging: unify field formats, intelligent deduplication, keep latest records. Suitable for form collection, offline events, social media promotion and other multi-source customer data integration with scoring and source tracking.

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