Applicants for the subsequent allocation of the ESS HK do not need to change their login contacts. You can still use the application number, mobile number, and password used by the contact person in the previous tranche to logon to the webpage.
If you make your specified month to be the same as that of the previous tranche application, you do not need to upload your documents or MPF details. Especially for those who did not qualify in the first tranche.