The procedure is exactly similar to logging in via email. Just that you don't need to set a password.
Is there any registration fee for using FreeCharge account?
Is the account secure?
How do I create a FreeCharge account?
Can I use my account without a smartphone?
Can I use my account without a computer?
What are the advantages of merging account?
Why should I Validate my account with an OTP on my phone number?
How do I add money into the FC account?
Where can I use my FreeCharge account?