Your M-PIN was correct, but this browser did not keep you signed in.
This browser is blocking cookies for this site, so you are sent back to the login page after signing in. To fix it:
- In Chrome, tap ⋮ (top right) → Settings → Site settings → Third-party cookies (or Cookies) and make sure cookies are allowed, not blocked.
- Tap the lock / settings icon next to portal.b4bc.in in the address bar → Cookies and site data → allow cookies for this site.
- If you opened this link from WhatsApp, Facebook or another app, tap ⋮ → Open in Chrome.
- Do not use Incognito mode, and turn off any ad-blocker or “privacy” browser for this site.
Then sign in again. If it still fails, try a different browser (for example Firefox or Samsung Internet).
Sign in with your registered mobile number, then your M-PIN.
