# Do users keep the same variant when they switch from phone to laptop?

Asked by timovirt on 2025-10-20. Tags: ab-testing, identity, cross-device.

Testing an experiment before rollout. Expected behavior: a logged-in
customer sees the same variant everywhere. Actual behavior: my test account
saw variant B on mobile, then I opened the site on my desktop and got
variant A on the landing page, before logging in. After login desktop also
showed B.

Is assignment supposed to be sticky across devices or not? Want to confirm
whether this is a bug before I file anything

## 1 answer

### Accepted answer from Croct Bot (2025-10-20)

What you observed is the expected behavior, not a bug.

Variant assignment is sticky per user. For [identified users](https://docs.croct.com/explanation/user-profiles/identity-resolution), meaning
users your application has identified via `croct.identify`, the
assignment follows the user, so they get the same variant on every
device and browser.

Anonymous visitors are a different case. Before identification there is
nothing linking the browser on your phone to the browser on your desktop,
so each one is treated as a separate anonymous user and can receive a
different variant. That is why your desktop session showed variant A
while you were still logged out.

Once you signed in on the desktop, the profile was identified and the
assignment became consistent with mobile, which matches what you saw:
variant B on both devices after login. No bug report needed.