Topic
You have a great customised desktop new item aspx form but you also want to have a Nintex mobile form available.
Publishing a Nintex Mobile form will overwrite your Desktop form as the Desktop form is the default form and cannot be removed.
Publishing a Nintex Mobile form will overwrite your Desktop form as the Desktop form is the default form and cannot be removed.
Instructions
To maintain the current desktop form but also have a Nintex mobile form you can create a second content type on the list and then create a Nintex Form on the second content type.
Desk top users will still have there form and Mobile users will only see the Mobile form.
Desk top users will still have there form and Mobile users will only see the Mobile form.