Vodafone has followed rival Three (3) by reducing the price of its 'Mobile Broadband' USB Modems (Dongles) from £99 to £49 when taken with a monthly contract. However, monthly contracts cost more, charging £20 per month for 3GigaByte's (GB) of included data allowance, which compares with £15 when taken with a 12 or 24 month contract.