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Enter a valid phone number

Error code invalid_phone
SMS & credit

Enter a valid phone number

invalid_phone

attn could not read the value you sent as a phone number.

HTTP 400·SMS & credit

What it means

What happened

attn could not read the value you sent as a phone number.

Why

Why it might have happened

  • The number was blank, too short, or had unexpected characters.
  • A country code may be missing.
Next steps

What you can try

  1. Send your number in E.164 form, e.g. +15551234567.
  2. For US/Canada numbers you can also send the 10 digits and attn assumes +1.
Related
Still stuck?

Get help

If the error keeps happening, contact support and include invalid_phone plus what you were trying to do on attn.ca.

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