No reliable contact

I bought the cable in January 2013, the seller Musiba Amazon. At first the contact was still acceptable. Wobbled has the cable when plugged in from day one, both on a Lumia 820 and on a Sony battery. Meanwhile, you can load to the cable only when the cable and the device absolutely silent and lying before making some attempts in which position ever an electrical contact is even made. Because I really need this cable for charging and just does not work safely this function I can not recommend the product. Buy another. The original charging cable by Nokia, for example, also provides after two years of intensive use (several times a day and unplugging) still uncomplaining his service.