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I'm in exactly the same situation. How did you resolve it? I've already registered my phone number and successfully tested sending an SMS message, but the option to opt out of the sandbox doesn't appear in the menu, even though I'm following the official AWS documentation.
answered a year ago
When moving out of the Amazon SNS SMS sandbox, you need to follow these steps:
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First, verify at least one phone number in the SNS console under "Text messaging (SMS)" in the Mobile section.
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Test SMS publishing by sending and receiving messages to your verified phone number.
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To exit the sandbox, go to the "Mobile text messaging (SMS)" page in the SNS console and click "Exit SMS sandbox" under Account information.
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This should redirect you to the AWS Support Center with a pre-filled support case. If you're seeing a different page than expected, you'll need to manually create a support case with the following information:
- Select "Service quota increase" as the case type
- Choose "SNS Text Messaging" as the service
- Provide your website URL or app name that will send SMS messages
- Specify the message type (One Time Password, Promotional, or Transactional)
- Select the AWS Region you'll use for sending
- List the countries/regions where you'll send messages
- Describe how customers opt-in to receive your messages
- Include any message templates you plan to use
The AWS Support team will review your request and typically respond within 24 hours. Once approved, your account will be moved out of the sandbox, removing restrictions like the 10 verified phone number limit and allowing you to send to any recipient.
Sources
Moving out of the Amazon SNS SMS sandbox - Amazon Simple Notification Service
Requesting support for Amazon SNS SMS messaging - Amazon Simple Notification Service
Using the Amazon SNS SMS sandbox - Amazon Simple Notification Service
answered a year ago
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asked a year ago

I was also in same situation where this is new account when i contacted support team i recived mail to submit previous aws bills, but it was new account. i bit stuck what to do...did you get solved your issue