Integer type field in Mobile

We have an integer field on Case entity, called Case Counter. We have put this on Search Case screen as well so that users can enter a specific value in it and based on that retrieve the case record. Users have option to search 'Equal To', 'Gretaer Than', 'Less Than', etc by selecting one of these in a dropdown against this field.

However, on mobile (iOS and Android) when I open this search screen, there is no dropdown to select 'Greater Than', 'Equal To', 'Less Than', etc. Users can only enter the value and on the basis of what a user enters, the system retrieves all the case records where value in this field is greater than what is entered on the search screen. Which means it is by default working with 'Greater Than'. We wish to search using 'Equal'. How do we bring that dropdown on mobile search screen?

Any inputs?

Regards,.