I love this idea to install free hotspots in the old phonebooths that are nearly not used anymore since most people have (smart)phones. http://mashable.com/2012/07/11/new-york-payphone-hotspot/
The rationale is that mobile operators try to offload their 2G and 3G networks to Wi-Fi because the heavy and fast growing data use the public is showing. The alternative is congestion and delays. I understand that this practice has been started in Hong Kong (PCCW, see photo), Germany and the UK too, but I am not sure if this street use was free there or complicated/expensive?
The sad fact is that, for instance in The Netherlands, most of the phonebooths have been removed already from the streets and railway stations. Key is that phonelines as well as power was available. Also other wireless access points can be installed in these booths, like the now small size basestations now rolled out by Alcatel-Lucent.