To sign up for Symphony from the Symphony website, click Sign Up Now located in the top left on www.symphony.com. You will then see a sign-up form:
Next you can invite others to join you on Symphony:
Once you have completed this, Symphony will ask you to verify your email account:
And here is a copy of the email:
Click on the Verify my email button and Symphony will then prompt you to enter a mobile phone number. This phone is used as part of Symphony’s two-factor verification process.
Symphony supports two-factor verification by combining an application login with a verification code sent as an SMS message to your mobile phone. Enter your mobile phone number and you’ll receive an SMS with the code. Return to your browser and enter the verification code as instructed.