Microsoft Lumia 640 dual sim that was launched in 2015. I have this phone for 1 year only. from my exprience this phone is average. lumia 640 mobile is great for those who love window. this mobile run on latest windows 10. in mid level hardware( like 1 gb ram etc.) this mobile run smoothly and lagging free compare to heavy android( 2 gb ram) mobile phone. it style and design is great speacialy different color back cover. its battery backup is good.
there are some bad expreince of me for this mobile. first its camera quality. its front camera is only <1 megapixel second photo not good in night. there are limited function campare to android.