I bought this phone a few days back and I want to write a review of my experience with it.
Build and design
The Microsoft Lumia 540 looks identical to Lumia 535, complete with rounded corners and a changeable coloured back cover that wraps around the phone. The white coloured demo unit sports a glossy finish. The right edge of the phone features the power and volume rocker keys, in black colour and offer above average tactile feedback. The top edge sports the 3.5mm headset jack while the bottom features the micro-USB port.
Display
The display of the phone is one area where the Lumia 540 has an edge over its predecessor(Lumia 535). The phone sports a 5-inch HD(720x1280p) IPS LCD display with ClearBlack technology. Viewing angles were wide and outdoor visibility under sunlight was decent.