On 29 June 2026, WhatsApp opened username reservations to its more than three billion users. The change looks small, but it touches one of the app's founding rules: until now, reaching someone meant knowing their phone number. Soon it won't, and your number will stop showing up to anyone who contacts you for the first time.
This is a genuine, long-overdue privacy win. But it's worth understanding exactly what the feature protects, what it doesn't, and why you should claim your username this week even if you're in no hurry to use it.
What changes, and what stays the same
Once you turn on a username, anyone messaging you for the first time, or a business you write to, no longer automatically sees your number. There's no public directory and no autocomplete suggestions: to reach you, someone has to know your exact username. The rules are simple: between three and 35 characters, at least one letter, and only lowercase letters, numbers, periods and underscores.
What the feature does not do is make you anonymous. Meta, which owns WhatsApp, still has your number tied to the account. Contacts who already saved you still see it. You're hiding your number from strangers and from groups you join, not from the company that collected it, nor from those who already have it. That distinction matters: it solves the problem of handing your number to a neighbour, a new colleague or an online marketplace listing, not the problem of who keeps your data.
WhatsApp sums up the idea this way in its announcement: "Your phone number is personal and sometimes you want to connect without handing it over."
Why you should claim your name now
Here's the part few of the alerts mention. A unique username is, by nature, hijackable. With more than three billion accounts, name overlap is inevitable, and whoever gets there first keeps the name. It's no accident that WhatsApp is letting creators and businesses claim the name they already use on Instagram or Facebook: it's a land grab, and the goal is to stop someone impersonating them.
Think about what happened on every network with public handles: the name of a brand or a well-known person becomes bait. A scammer registers a name close to a bank's, a shop's or yours, and uses it to approach people who trust that name. Reserving yours now, even if you only use it months from now, closes that door before it opens.
How to protect yourself
The strongest defence already ships with the feature, optional though it is, and it's the one you should switch on:
- Reserve your name now in Settings > Account > Username, on the latest version of the app, even if you won't use it yet.
- Turn on the username key when it's available: it's an extra credential that forces anyone who hasn't saved you to know both your name and the key before they can send a first message. It's your filter against strangers.
- Don't mistake this for anonymity. For anyone who already has your number, or for Meta itself, nothing changes.
- Be wary of a "new" contact who only gives you a username and a story in a hurry. It's the old scam script, with a fresh face.
Real privacy isn't hiding your number from those who want to see it: it's deciding who reaches you. This feature finally hands you that switch. Use it with your head on, and claim your name before someone else does.
Source: SecurityWeek.
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