Luxembourg fixed and mobile operator Tango has launched the Tango Club customer loyalty programme offering members exclusive promotions on a monthly basis. Tango’s prepaid customers who join the club will be able to make free calls to other club members from the day they sign up, while post-paid subscribers will benefit from exclusive and preferential offers. Customers join Tango Club online for free. Rewards include special discounts on Tango services, prize draws for mobile phones, PCs and high-tech accessories, special....