OPT (one time password) SMS is not arriving. Is it being blocked?

​@diamond-hoof-care-ltd. Forgive me, but I have to be dumb for a second. What is “OTC from Amazon?”

​@ByrneReese Sorry. One Time Password (OTP)

​@diamond-hoof-care-ltd. Thank you for clarifying. I took the liberty of updating your original question accordingly - I hope you don’t mind. Let me see if I can get someone to chime in here to help you. 

Hello ​@diamond-hoof-care-ltd. , most of the services (like Amazon, Whatsapp, Facebook) need real SIM based numbers to be able to send SMS for OTPs (due to security concern). Since RingCentral numbers are VOIP numbers, SMS is blocked on the side of these originating services (and not on RingCentral side as we never receive it at first place).

I searched and came across a similar issue with Google Voice virtual number - https://sellercentral.amazon.com/seller-forums/discussions/t/3fc15a40-e5db-4588-a105-c3074dd3fe26?utm_source=chatgpt.com

In your case, I would recommend you to contact Amazon customer support and provide your RC number, and let them confirm if it’s a good number to receive SMS OTPs or they need a SIM based mobile number.

If RC number won’t work, you can choose a Call for OTP or use Authenticator app as alternative options.

​@gurpreetsingh Thank you for this answer. But even the OTP Amazon phone calls do not come through. My attempts show in my logs but the phone does not ring. Same reason?