3 UK has announced availability of the Sony Ericsson Zylo, Nokia E63 and Nokia 5230 smartphones for free on The One Plan. The One Plan offers a monthly allowance of 2,000 any-network minutes, 5,000 3-to-3 minutes, 5,000 texts and 1 GB of data for GBP 25 per month. It has been designed to let customers use their smartphones to talk, text and use the internet.