I have used Nokia Lumia 520 for 3 years. The phone doesn’t have flash light and front camera. It has 512MB RAM and 8GB internal memory which can be expanded up to 64 GB through sd card.
I have not face any hardware issue with this phone. Hardware is excellent. But but there are lots of features in Android phone which is not available on Windows phone. Lots of apps are not available for this phone. Which makes this phone too boring.
In this fast world we need all the features in a phone. So I have sold my Windows Lumia 520 and bought an android phone.