help please how to make price and location required

[3ashmawy]

help please
how to make price and location required fields in post ad page
with modern theme - osclass latest and how to make a required field for phone digits only in post ad page
and if it possible disable free when enter 0 in price field
sorry i know its my first post but i tried hard with old topics and can't resolve this

[teseo]

how to make price and location required fields in post ad page

For location, there is this plugin:

http://market.osclass.org/plugins/location-required_21

For price, the author of this post claims it works for Modern:

http://forums.osclass.org/3-2-x/i-want-to-make-price-field-reqiure/

with modern theme - osclass latest and how to make a required field for phone digits only in post ad page

Custom fields (Admin Dashboard / Listing => Custom fields. Create a custom field "Telephone" and check "This field is required".

and if it possible disable free when enter 0 in price field

This I don't quite understand, please elaborate.

Regards