How to fix sign-in problems on the POS app
Android
Sunmi
Updated Aug 2026
If you can’t sign in to the POS app, it’s usually the store code, the credentials, or the connection — the first sign-in needs internet to download your catalogue. Work through these checks.
Step by step
- Check the store codeConfirm you entered the correct store code for your business (it identifies which business to sign in to).
- Check credentials and that the user is activeConfirm the cashier login and password are right, and that the user is active with a role — an owner can check under Users.
- Check the connectionThe first sign-in needs internet to download the catalogue. Confirm the device is online.
- RetryReopen the app and sign in again. Once signed in, the app can then sell offline.
Frequently asked questions
Why can’t I sign in to the POS app?
Usually a wrong store code or credentials, an inactive user, or no connection for the first sign-in. Check each; the initial sign-in needs internet, after which the app works offline.
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