WhatsApp lets your account run on linked computers and tablets at the same time — convenient, but also the main way someone secretly reads your chats. The linked devices list is where you catch and cut them off.
We’ve written this for WhatsApp users from the ground up. There’s a numbered step and an illustration for every action, with no jargon and no assumed expertise. Keep your phone in hand and do each step as it comes.
The methods are ordered from quickest to most thorough. Do as many as your situation calls for; even the first one meaningfully improves things. Every linked tool is an official one you can trust.
In short: open Linked Devices, spot and remove unknown links, turn on the security PIN and login alerts, and lock down the phone itself. The full walkthrough that follows shows precisely where to find each control.
Route 1: Find Linked Devices
You won’t need any technical skill for this — just your phone and a couple of minutes. The steps are ordered so you never have to double back.
1Open Linked Devices
In WhatsApp options, open Linked Devices. It lists every computer or tablet currently connected to your account, each with a last-active time.
Anything here can read your chats. If you didn’t link it, someone else did.
Last-active times are your friend here — a device that was ‘active’ while you were asleep, or in a place you’ve never been, is the clearest evidence of all.
- Open WhatsApp Settings > Linked Devices
- Each entry can read your messages
2Spot and remove unknown links
Review every linked device. A browser or computer you don’t use is a clear sign someone linked WhatsApp Web without your knowledge — often during a moment with your unlocked phone.
Tap any unknown entry and choose Log Out to sever it instantly.
Removing a device you turn out to own is harmless; you simply sign in again. That makes caution the right call — when unsure, remove it.
- Log out of any linked device you don’t recognize
- Unknown WhatsApp Web sessions are the usual culprit
Route 2: Lock It Down
Here’s the practical, click-by-click version. Do the steps in sequence on your own phone as you read, and let the images guide each tap.
3Turn on the security PIN and login alerts
Enable WhatsApp’s two-step verification PIN so your number can’t be re-registered elsewhere without it. This blocks the other main way accounts get hijacked.
It adds a code that’s required when setting up WhatsApp on a new phone.
Once this is on, even someone who somehow learns your password is stopped at the door, because they can’t produce the second code that only reaches you.
- Turn on two-step verification (PIN)
- This blocks re-registering your number elsewhere
4Lock down the phone itself
Linking happens with brief physical access, so set a screen lock only you know and enable WhatsApp’s app lock if available. No physical access means no sneaky linking.
These two locks close the door the intruder used.
Almost every sneaky setup starts with a moment of physical access, so a lock only you know quietly prevents the next attempt before it begins.
- Set a private screen lock on the phone
- Enable WhatsApp’s app lock if available
Read This First
- Linked devices keep working in the background, so check the list specifically — you won’t ‘see’ them in normal use.
- If this is part of an abusive situation, removing a link may be noticed; plan for safety.
Good Habits
- Glance at Linked Devices monthly; it’s the fastest WhatsApp privacy check.
- Set the two-step PIN to something unrelated to your other codes.
Frequently Asked Questions
Will logging out a device alert the person?
No alert is sent, but their mirrored session stops working immediately, which they’ll notice.
Can someone read my WhatsApp from another phone?
Through linking, they can mirror your chats to a computer or tablet. A second phone would require re-registering your number, which the two-step PIN prevents.
How did they link a device without me seeing?
Usually a quick scan of the linking QR code while they had your unlocked phone. A screen lock and app lock prevent a repeat.
Helpful Resources
These first-party tools let you check and lock things down directly:
- WhatsApp Linked Devices help — open it to check or manage this yourself.
- Google Security Checkup — open it to check or manage this yourself.
- Google Play Store — open it to check or manage this yourself.
- Apple App Store — open it to check or manage this yourself.
Go at your own pace. If anything here feels like a lot, do just the first method today and come back for the rest tomorrow — small, steady steps add up to a phone that’s genuinely harder to track.
Your Monthly Two-Minute Check
Fixing things once is great — but a light, regular habit is what keeps them fixed. Here’s a quick routine that does most of the work for you.
Pair this with two-factor authentication on your most important accounts — your email above all, since it can reset every other password. With those two habits in place, the doors casual snooping relies on stay shut.
Why This Is Worth Doing
The reason these steps work is that they target how monitoring actually happens in practice, not the dramatic movie version. Ordinary people are followed through ordinary settings, and ordinary settings are exactly what you’ve just learned to control.
Easy Mistakes
- Leaving automatic updates off, which keeps the security holes that monitoring tools rely on wide open.
- Assuming an unfamiliar name is harmless without checking it, or deleting a real system component in a panic.
- Stopping after one step — the doors work together, so a single fix often leaves another open.
- Trusting a flashy ‘detector’ app from outside the official store, which is a common disguise for the very thing you’re trying to remove.
Getting Support
If you’ve worked through everything and still feel watched, it’s reasonable to bring in help. A trusted person, your phone maker’s official support, or a local support service can give a second pair of eyes. And if any of this connects to feeling unsafe with someone you know, a domestic-violence support service understands technology-facilitated abuse and can help you plan.
Quick Recap
To bring it together for WhatsApp users, here’s the whole process at a glance:
- Open Linked Devices
- Spot and remove unknown links
- Turn on the security PIN and login alerts
- Lock down the phone itself
None of it is hard on its own — it’s just a sequence, and now you have it.
Extra Context
- Physical access is the common thread in nearly every monitoring story, which is why a screen lock only you know is one of the highest-value habits there is.
- Two-factor authentication is the closest thing to a single high-impact fix: it makes a stolen password almost useless on its own.
- Your email account is the master key to everything else, since it can reset most other passwords; protecting it first protects the rest by extension.
- Reusing passwords is what turns one company’s breach into your problem across many accounts, so unique passwords are less about that one site and more about containment.
These are the principles the individual steps grow from, so they’re worth keeping in mind even after the details fade.