Solarbox plans on changing this.
The first box has been set up in London's Tottenham Court road so should be useful in the busy shopping district. Though the user has to have adverts playing whilst the phone is being charged, it's free for anyone to go in and juice up their phone.
Other ideas for recycling the neglected phone boxes are already in use; some have been made into mini libraries, some are now used to stock medical equipment and New York has started on plans to turn thousands into wifi hotspots.
There are plans to have 6 more Solarboxes pop up over the capital.
source : http://www.independent.co.uk/life-style/gadgets-and-tech/londons-red-phone-boxes-go-green-are-converted-into-solarpowered-phone-chargers-9770474.html