Operators faced with overloaded 3G and 4G networks would also like to use Wi-Fi offload for users as well as for backhaul data, which is why both the Wi-Fi Alliance and the Wireless Broadband Alliance are working on standards to simplify connection and roaming: Hotspot 2.0 and Next Generation Hotspot (NGH) respectively.

via Wi-Fi roaming: Hotspot 2.0 and Next Generation Hotspot | ZDNet.