WhatsApp has started the global rollout of username reservations, marking a significant transition in how users connect on the platform. The new feature is designed to act as a robust privacy shield, allowing individuals to communicate without disclosing their personal phone numbers. Here are some FAQ Questions & answers

For most people, choosing a WhatsApp username should be something unique that only people you want to contact you will know. If you need help picking one, we have a username generator to make one work just for you. There is an reserved an option to claim their existing Instagram or Facebook username on WhatsApp.
Once we launch usernames, when you message a person or business for the first time they will no longer see your phone number if you enabled your username.
Reserving your optional username takes just a few seconds on the latest version of WhatsApp – go to Settings > Account > Username.
WhatsApp username reservations FAQ
Q: Are usernames mandatory?
A: Nope, they are optional.
Q: What if the username I want isn’t available?
A: There are a few reasons you might not be able to reserve the username you want: 1) It’s an existing Instagram or Facebook username; these are reserved for their owners. 2) We’ve held well-known names and some variations of them – like public figures, celebrities, government entities and Meta-verified accounts – so they can only be claimed by their legitimate owners. If you try to reserve those, the system will say it’s not available. 3) Someone already claimed a common name, in that case use the username generator.
Q: What if someone creates a username similar to mine to impersonate me or run a scam, how do you stop someone from pretending to be me?
A: Usernames are not available for messaging yet. When they are, and you get a message from someone new, we’ll let you know the country origin, and a warning for first-time outreach. Well-known public-figure names and their variations are held for verified owners. We’re also keeping a close eye on blocks and reports to take action against scammers.
Q: Can random people message me if they know or guess my username?
A: Just like you can’t search for a phone number in WhatsApp, you can’t search for a username. The best way to prevent someone from contacting you is to add a username key and to choose a username that is unique to WhatsApp. All the current measures remain in place to prevent unwanted contact, including warnings with details about unknown senders (whether they’re a new account, if you share groups, what country they’re in) and the ability to block and report.
Q: What is a username key?
A: An extra layer of protection you can enable with your username, so that another user will have to know both your username and your username key to contact you. You can reset your key at any time to stop new inbound contact through your username.
Q: Do I have to link my other Meta accounts?
A: If you want the same username as your Instagram or Facebook account, you’ll have to link them. This one of the ways to reduce impersonation and to make sure you’re the legitimate owner of the account. But after that, you can unlink the account if you want, or you can choose a username unique to WhatsApp.
Q: Can I change my username later?
A: Yes, as long as the new one you want is available.
People are making false claims about reserving popular or well-known usernames – this isn’t true, only the legitimate account owners are able to reserve well-known public-figure names. enabled reservations before usernames launch later this year