Incase you user wants to initiate a call irrespective of the filed(mobile number filed or phone number filed) where the phone number is saved. Please use the below URL as the callback URL.
https://mobile-notifications.leadsquared.com/InitiateCall.aspx?AccessKey=@{User:AccessKey , }&SecretKey=@{User:SecretKey , }&UserID=@{User:Id , }&LeadID=@{Lead:ProspectID , }&OrgID=@{Account:ShortCode , }&Phone=@{Lead:Phone , }&Phone=@{Lead:Mobile,}
Also, Please make sure users are logged into the mobile app on the mobile device.
