Vodafone UK will begin a multi-million pound investment to extend its mobile broadband network to another three million people across six major cities.
The firm said it will focus on getting more mobile broadband users from Birmingham, Bristol. Glasgow, Liverpool, Manchester and Reading.
These towns and cities join London and major British airports, which were the first locations to benefit from Vodafone's high speed upgrade in 2007.
Roll out is expected to be completed by autumn 2008.
This summer will also see Vodafone start to simplify the way it sells mobile broadband services to customers.
The firm also said customers will see a change in the way Vodafone UK sells mobile broadband, providing them with information that reflects the way they actually use the network.
For example, customers can expect to see more information at the point of sale to help them understand the time it will take to download files, films and music on the mobile broadband network4.
The number of emails a customer can expect to download or the number of web pages they can browse will also be more clearly illustrated. Details will be made available in store, online and through our contact centres from June.