Microsoft Lumia 550

On 6th October Microsoft  talkimg about Surface Pro 4 tablet,Windows 10 Mobile flagships,the Lumia 950 and 950 XL as well as second generations Band wearable device.
And Also other lumia devices Like Lumia 550-Code Name 
'Saimaa'. 

Windows Central reports that it exactly like the current Lumia 640
The key specs and features of the device:
  • 1280x720px AMOLED (the Swiss listing stated that the size is 4.7-inches)
  • Quad-core 1.1GHz Qualcomm Snapdragon 210 processor
  • 8GB onboard storage
  • microSD card slot
  • On-screen Back, Start and Search buttons
  • Glossy white or black options, with 'metal around the display'
  • 4G LTE connectivity
The report did reveal that the Lumia 550 will include a front-facing flash for the front-facing camera.