I knew many of you are searching for number field type like mobile/landline field types in drupal. As drupal integer type wont support 10numbers for mobile or landline..hence we will install a module names bigint to achieve this functionality
Just download and install that module..after enabling the module..
Goto structure->content types->your content type(basic page/classified ad/product)->manage fields
their create a new field with field type big int and configure it.
Thats it..now you can have any number in that field…enjoy 😀