Phone verification fails with 400 Bad Request on /startSMS - Venezuela (+58)

Problem Description

I'm trying to create a new AWS account from Venezuela but I'm stuck at the phone verification step. When I click "Send SMS" (paso 4 de 5), the system shows a generic error message: "Se ha producido un error al procesar la solicitud. Vuelva a intentarlo."

Error Details

From browser console, I can see:

• Endpoint: POST https://portal.aws.amazon.com/billing/signup/rest/v1.0/diva/startSMS?type=resubscribe
• Response: 400 Bad Request
• Initial errors: net::ERR_BLOCKED_BY_CLIENT on logging endpoints
• Meta tag error: Error: failed to parse meta tag awsc-session-data

What I've Tried

1. ✅ Different browsers (Chrome, Firefox, Edge)
2. ✅ Incognito/Private mode
3. ✅ Cleared cache and cookies
4. ✅ Disabled ad blockers and extensions
5. ✅ Waited 72+ hours between attempts
6. ✅ Verified phone number can receive international SMS
7. ✅ Tried multiple times over several days

Account Details

• Country: Venezuela (+58)
• Phone: +58 424-*** (mobile number)
• Operator: [Movistar/Digitel/Movilnet - especifica cuál]
• Email: infra@flenryk.dev

Additional Context

• No voice call option is available in the UI
• According to AWS documentation, Venezuela requires "local address" for voice calls
• I contacted AWS Support but received no response
• The same number works for other services (WhatsApp, Telegram, etc.)

Questions

1. Is there a known issue with phone verification for Venezuelan numbers (+58)?
2. Can AWS enable voice call verification for my number?
3. Is there a way to manually verify the account through support?
4. Are there regional restrictions for Venezuela that I'm not aware of?

Browser/Environment

• Browser: [Chrome/Firefox/Edge - especifica]
• OS: [Windows/Mac/Linux - especifica]
• Network: [WiFi/Mobile data - especifica]

Any help would be greatly appreciated. I need to activate my account for development work.

Thank you!