NOKIA CA-157 USB OTG Adapter cable Nokia N8 E7-00 X3 Nokia Adapter Cable for USB OTG CA-157 Compatible with: Nokia C3 Touch and Type, Nokia C6-01 Nokia C7,Nokia C7-00, Compatible with: Nokia E7-00, Nokia X3 Touch and Type, Nokia N8 Easily back up essential files stored on your phone. Connect this adapter to browse files stored on a USB memory device - then transfer photos, videos, documents and other data between your compatible phone and the external memory.