With a promise of free Double Minutes and reduced user fees, T-Mobile revamped their Business 1-Plan tariff. Apparently the IPS is challenging rival providers by offering up double minutes for businesses with below 30 people in their plan, and for those businesses with over 30 people there will be a fee of £10.00 per month.
The 1-Plan also gives unlimited colleague-to-colleague voicemail and calls within the United Kingdom for up to 250 users, and businesses will be able to blot on bundles of minutes in stages of 250 as required to meet their needs.
Source — T-Mobile