How to configure the entry of a telephone number so that the collector is only able to enter “08 digits”

[Kal_Lam]

Hi @Sylvain_DOAMBA,

Try using the regex code regex(., '^[0-9]{8}$'). A similar example has already been discussed in the forum:

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…

To learn more on regex please feel free to visit our support article Restricting text responses with regular expressions.

Have a great day!