I have stored titrated phage (100%glycerol 200µl: phage suspension 800µl) = total 1ml in 1.50mal eppendorf tube at -4, -20 and -80, but the storing long time for above two week in the stored phage was not alive.
For short-time storage you can just pellet cells in centrifuge and store supernatant at 4C or prepare PEG-fractionated sample. For long storage you need to obtain CsCl2 preparation, it can be stored at 4C too.