A image has leaked via Baidu from the certification documentation for the Nokia Lumia 730.
The document confirms the device will have microSD support and will use a nano-SIM.
According to tipster nokibar the handset will also support Qi wireless charging via a removable back, and will also support 4G LTE.
The handset is 68.5 mm by 134.7 mm and is expected to include a uni-body polycarbonate design, 4.7 inch 720p screen, dual-SIM capability, 6.7 megapixel rear and 5 megapixel front camera, Carl Zeiss lens, Snapdragon 400 processor and Adreno 305 graphics, with 1GB of RAM and 8GB of storage. The device lacks hardware navigation and camera keys.
Thanks Nokibar for the tip.