How to Use and Manage WhatsApp Usernames for Better Privacy
WhatsApp introduces usernames to hide phone numbers from contacts
WhatsApp is rolling out a username feature that allows users to share a unique handle instead of their mobile phone number to establish new contacts, according to reports from TF1 Info and Notre Temps. The update aims to increase user privacy by removing the requirement to disclose a personal phone number when connecting with others on the platform.
How do WhatsApp usernames work?
The new functionality enables users to create a personalized pseudo, or username, which serves as a public identifier. According to TF1 Info, this allows individuals to provide a contact method without revealing their private coordinates. Once a username is set, other users can find and message the account using that handle rather than searching for a specific telephone number.
How to set up and block a WhatsApp username
Users can reserve their preferred username within the application settings to prevent others from claiming the same handle. Frandroid reports that users should act quickly to secure their chosen pseudo.

Why is WhatsApp changing its contact system?
Sfr actus notes that the introduction of profile names is a move toward greater user vigilance and data protection.