Nokia new an upcoming Nokia Lumia smartphone are leaked on the popular Chinese social network Sina Wibo earlier this week .This smartphone have an aluminum case , a shift way from the traditional polycarbonate case of past Lumias. This smartphone have 4.2- inch display ,8.7- Mp camera and dual core 1.5 GHZ Sanpdragon S4 processor. The rest of specifications are 1 Gb RAM , 16 GB internal storage and 2,000 mAh battery , According to rumors this smartphone will be announced on 15th May for  a last June released date on T-mobile .