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sami amisami ami 

Help with validation Rule?

Hi,
I need help to write validation rule for contact number as it should accept only numbers not text and any other characters...thanks in advance.
Vinit_KumarVinit_Kumar
Try below rule :-

NOT(ISNUMBER(ContactNumber__c)) // replace it with correct API name of field

If this helps,please mark it as best answer to help others.