Superficially that seems ok, but it won't come across that way. By letting the employees decide for themselves they will feel far more empowered - contrast tha

Superficially that seems ok, but it won't come across that way. By letting the employees decide for themselves they will feel far more empowered - contrast that against "a random number generator says you get this phone - deal with it". And what will happen in the good teams is that they will work it out amongst themselves. And maybe they'll get them in proportion to the market, or maybe they will swap phones every month, or maybe they will come up with other good ideas. But if they don't feel in control they are far less likely to act as though they are.