Hi Neil,

You can try this regex, this one is working fine for me.
 

isMatch($PersonalDetails/Mobile,'^(\+\d{1,3}[- ]?)(?!0+$)(?!1+$)\d{12}$')

Here you can add the country code also  eg(+91,+111)
 

If you don’t want a country code use this one  ^([- ]?)(?!0+$)(?!1+$)\d{12}$

I hope it helps

Hi Neil,

Check out the phone number regex in the below link with multiple regex formats.

^[\+]?[(]?[0-9]{3}[)]?[-\s\.]?[0-9]{3}[-\s\.]?[0-9]{4,6}$

https://ihateregex.io/expr/phone/ 

You can also validate your regex in the below link

https://regex101.com/ 

Hi Neil,

Use the below regex format to check 12 digit validation.

@"^[0-9]{12}$"

Bookmarking it for future reference