Phone number constraint

[hamidmumtaz]

I used RegEx to limit phone numbers to 11 digits, it works perfectly fine while filling questionnaires on the laptop but it does not allow me more than 9 digits on the phone.
Similarly, i limit the age to 99, it works well on a laptop but while filling form on a phone, the constraint is not applied. please advise.
i used regex(., ‘^\d{10}$’)

[Kal_Lam]

Welcome to the community, @hamidmumtaz! Your question type should be text and the appearance should be numbers to make it effectively work.

[hamidmumtaz]

Thanks Kal. it works now

[wroos]

Welcome @hamidmumtaz,
For integer variables (up to 9 digits), e.g. age you can use simple constraints like . <99 and . >0
See also the Help Center articles

• https://support.kobotoolbox.org/validation_criteria.html?highlight=constraint
• https://support.kobotoolbox.org/number_text_responses.html?highlight=constraint.

Also, be aware that there is an essential difference in the behaviour of regex between Enketo (webform) and Collect, see

• https://support.kobotoolbox.org/restrict_responses.html?highlight=regex (last paragraph).

For consistent behaviour, better use always ^ at the beginning of the regex pattern.

[hamidmumtaz]

thanks Wroos. very helpfull