The Lumia 540 has a 8 megapixel rear(primary) camera, which will produce high quality photos. Its 5 megapixel front camera makes it a good selfie phone. Although this phone has following drawbacks which I am facing now a days.
This phone works quite slow.
Lack of apps.
It does not support 4g.
Only 3.4 Gb space is available for apps
Although This phone is 3g compatible. But there is not manually 3G setting option I mean you cannot set UMTS mode when you want. This phone automatically switches 3g and 2g.
so If there will weak 3g signal then you can’t get connected properly with 3g network. I am also facing this problem.you can get day full battery backup on average usage. so battery backup is good.Look of this phone is High end and very decent. Sound quality is also Good.