Vodafone has opened up the possibility of offering its mobile broadband customers a much faster service.
The latest trial conducted by the operator shows that actual speeds of 16Mb can be reached with the new HSPA+ standard technology.
After the tests were made by Vodafone's Spanish division, further trials of a mobile broadband service offering speeds of up to 21Mb are likely to take place.
Andy MacLeod, global networks director of Vodafone, commented: "Successfully demonstrating a live HSPA+ high speed connection has been a key milestone in continuing to build confidence in this new technology.
"The results show that HSPA+ technology is well placed to further enhance our customers' mobile broadband experience through the evolution of our existing 3G networks."
HSPA+ uses an advanced modulation technique known as 64QAM and adjustments to base stations and data equipment are also expected to increase speeds.