What about if you've got one of those belt loop phone holders that IT technicians from the late 90s had?

( Donkey Gums @mattcomedy, Tue 30 Jun 2009, 14:06, archived)

spango-phone is too stylish for that
but it does have an optional battery pack that has to be carried in a wheelbarrow.
( spangolin - the odds are good but the goods are odd, Tue 30 Jun 2009, 14:17, archived)