NEW: Add virtual phone numbers to receive text message and voice calls online for any verification. Get a second number and phone numbers online. Free OTP Authenticator App for 2FA Authentication. Enalbe 2-step verification to protect your account from hijacking Create one-time passwords (OTP) for secure two-factor authentication for all services. RFC 4226 (HOTP Algorithm) and RFC 6238 (TOTP Algorithm) With Verifyr Authenticator you can use two-step verification (2FA) for all providers. This