Error message is not displayed on the tablet

[Kal_Lam]

Maybe this post discussed previously should help you solve your issue:

Block the phone number in nine positions

Hi @wote, Welcome to the community! You could do the same as outlined in the image below using regex code: In the survey tab of your xlsform: [Image 1] Data entry screen as seen in Enketo: Error showing while entering a wrong entry [Image 2 (Error)] Data entry screen as seen in Enketo: Error not showing while entering a correct entry [Image 3 (OK)] Reference xlsform: Phone Number (Regex).xlsx (10.1 KB) You could also have a look at our support article Restricting text responses with…