Send SMS - Error MSG-304

Hi . Greetings.

I am currently working on sandbox environment, and my phone number is associated to my account. But when I try to test sms api, it returns an error "Phone number doesn't belong to extension"

What's wrong?

Please let me know your thoughts.

Thanks.

Hi . Greetings.

I am currently working on sandbox environment, and my phone number is associated to my account. But when I try to test sms api, it returns an error "Phone number doesn't belong to extension"

What's wrong?

Please let me know your thoughts.

Thanks.

Hi @NuCare Admin

I think, this issue may be that you are using your sandbox number in production environment. Please note that both environments are different.

Lets say your sandbox number is 772-XXX-YYYY

For Sandbox environment, you will use

1a. Sandbox URL: https://platform.devtest.ringcentral.com

1b. Sandbox Application credentials

1c. Sandbox User (Lets say extension 101 who owns this number 772-XXX-YYYY)

Now, when you graduate your application to production, you need to migrate to new production environment.

2a. Production URL: https://platform.ringcentral.com

2b. Production Application Credentials

2c. Production User (Let’s say extension 101 who owns new production number 566-AAA-BBBB) -> THIS IS NOT THE SAME SANDBOX NUMBER AS 1c

Looks like you are using 2a and 2b but with 1c (ie with sandbox number)

So to use SMS API’s in production, you need a production account which can be purchased from https://www.ringcentral.com/office/plansandpricing-b.html#mvp

Please note, you need to be on Premium or Ultimate account to be able to use Developer Platform APIs (i.e SMS APIs)

When you use your production user with a production number against production environment, everything will work.

Hope this clarifies, but in case the problem persists, I suggest you to open a direct ticket here: https://developers.ringcentral.com/support/create-case and we can look into your case more closely.

Regards

Gurpreet Singh

PM, Platform Products