UK mobile network operator O2 has confirmed it is currently rolling out a variant of DC-HSPA which will support connections of up to 42Mbps. Although the dual-cell HSPA technology can support impressive speeds, the technology will still operate as 3G ahead of the 4G spectrum that is being planned for the UK. British owners of the latest iPad or Nokia Lumia 900 (devices that support DC-HSPA) will be able to take advantage of the speeds providing their local mast has been upgraded. O2 says it's rolling out to "major UK cities," but there's no word on exact locations.
Three is also planning to rollout a 42Mbps version of DC-HSPA over the summer and T-Mobile / Orange are planning to support the technology later this year. Vodafone, the fourth major UK network operator, started to rollout a variant of DC-HSPA last year, but with support for up to 28.8Mbps — the company says it has no plans to support the 42Mbps variant.