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champdiningAsked on August 15, 2017 at 11:45 PM
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JanReplied on August 16, 2017 at 12:04 AM
Please enable the "Input Mask" option in the Phone Properties. Here's how:
1. Select the Phone field and then click the "Properties" button.
2. Under the "Options" tab, please turn on the "Input Mask" option. By default, you'll see the "###-####" format. The hash symbols represent numbers. It means that only numbers are allowed to be entered in that field.
For more information, please check this guide: https://www.jotform.com/help/381-Getting-Started-with-the-Basics-of-Input-Masking.
Hope that helps. Thank you.