Go to Me → Settings → Account → Phone Number (or Email).
To change phone: Step 1: Tap "Change Phone Number". Step 2: Verify your CURRENT phone — Fuvio sends an OTP to your old number. Enter it. Step 3: Enter the NEW phone number → receive OTP there → enter it. Step 4: Done. All login will now use the new number.
Lost access to old number (cannot verify it)? Tap "I cannot receive OTP on old number" → upload a selfie + government ID → submit feedback. Review takes 3-5 days. After approval, the new number is bound to your account.
Same process for email. Two-step verification protects your account from hijacking.