Phases are only used to describe the natural history of patients who are not on any medications. Once you are on medication, it is more usual to classify you as non-responder, partial responder or full responder.
Currently, there is no cure for HBV, for some patients it is possible to stop medication after several years and the response can still be maintained, a lucky few will become cured. For most, they will continue to take the medication, be well, until a cure comes available.