Optical fiber connectors configured to allow ease of change of the connector polarity by providing lockable outer housing. In an embodiment, an optical fiber connector comprises an inner housing, a key disposed along a side of the inner housing, wherein the inner housing includes at least one protrusion configured to lock the key, and an outer housing disposed around at least a portion of the inner housing and the key. The outer housing may be configured to be pulled rearward relative to the inner housing, and further configured to unlock the key to allow slideably moving the key from a first position to a second position.