Can an Angel One Account Be Opened Online if the Aadhaar Is Not Linked to a Mobile Number?

No, if your mobile number isn't linked to your Aadhaar, you can't open an Angel One demat account online. You need to use the OTP-based verification technique to validate your mobile phone number to finish the online Demat account opening process. Opening a Demat account requires connecting your Aadhar, which is a one-time process.