Verifying Phone Numbers
When and Why to Use
Use this to verify the respondent’s identity by phone. This adds a layer of security and is ideal for:
• High-sensitivity or confidential surveys
• Preventing duplicate responses
• Ensuring respondent authenticity for incentives or gated content
Respondents enter their phone number, receive a code by SMS, and must enter it correctly to continue.
Chat Experience
• User is prompted to enter a phone number
• Next screen prompts for the code sent to their device by SMS text message
• Failure to verify shows termination message
Traditional Experience
• Experience is the same as portrait with more screen real estate for labels and buttons
• Designed to work well across device types, including mobile and desktop
Chat Experience | Traditional Experience | Traditional Experience, Mobile optimized |
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Configuration Options
Option | Type | Required | Default | Description |
question_1 | string | yes | - | Prompt asking for the phone number |
question_2 | string | no | “Please enter the code we sent you.” | Prompt asking for the verification code |
termination_message | string | no | “Sorry, the code you entered was incorrect” | Message shown if verification fails |
store_phone_number | bool | no | False | Whether to save the number in the response data |
image | MediaItem | no | - | Optional image shown above the question |
default_country | string | no | US | Default country code for phone formatting |
tags | s.tag() | no | - | For use in grouped reporting or string substitution |
Example Code
s.authenticate_by_phone_number( "This is a high security survey. Please enter your phone number to continue, and we'll send you a verification code." )With custom prompts and storage:
s.authenticate_by_phone_number( question_1="Enter your mobile number to receive a code.", question_2="Type the code sent to your phone.", termination_message="That code doesn't match. Access denied.", store_phone_number=True, default_country="GB" )Notes
• Verification is one-time and applies per survey session
• You can use the stored phone number later in your logic (e.g., deduplication)
• Ensure this usage complies with your local data privacy regulations