If we edit any contact number with '+' sign on Freshdesk, we can not search this number with API.
Suppose, I updated a contact number as '+916291361159' and save.
Then I can not search this contact with this APIs below -
https://8x8ps.freshdesk.com/api/v2/contacts?phone=+916291361159
or
https://8x8ps.freshdesk.com/api/v2/contacts?phone=916291361159