After making a phone call, the review process will be faster, and the examiner usually has 4 months to process the reply. If the landlord is lucky enough, the reply submitted on the same day will be handled by the examiner on the same day; Sometimes things go wrong, for example, the examiner in charge of this case is on a business trip or other reasons delay the time, and it may take several months to process this reply.
A more appropriate way is to remember to call the examiner to inquire about the progress of this case, and be careful not to ask too many technical things, so that he/she will not neglect you when he/she is busy with official business.