Sony has made a new model at the top of its M class of smartphones, the Sony Xperia M5. It looks very similar to the Xperia Z3+, but is not quite as well-equipped on the inside. Its standout feature is a very promising front-facing camera, nothing else.
Sony might have given the Xperia M5's appearance just like any other Z series device, but the frame is made of plastic, not metal, leaving the M5 feeling cheaper than the Z3+. The build is, however, completely waterproof and dustproof.
The display is excellent and clear, and reproduces colors brilliantly. The contrast and color range are extensive and rich and the image quality comes close to UHD screens. It is having a 5-inch IPS panel with a full HD resolution of 1,920 x 1,080 pixels and a pixel density of 441 ppi. It exceeds the average resolving power of the human eye :).
Unlike the Sony's Z series, the Xperia M5 does not come with headphones. The in-built speakers are are very norma and offer mono rather than stereo sounds. The maximum volume is also quite low.
The Sony Xperia M5 cameras are clearly its strong point. The main camera delivers high-contrast, sharp images in 21.5 MP and the selfie camera produces pleasing wide-angle shots in 13 MP. The quick-start function can be used to wake the phone from standby and go directly into the camera app. However the shots were not quick sometimes.
And the phone has 2,600 mAh battery, which is about average for a five-inch smartphone. I don't know why Sony is still keeping the battery power low in their devices while the screen size of them are increasing in every new models.

Here is my review about Xperia M5.
The phone design is looking good and having good feel to hold it on hand, but looks just like any other Sony smartphone released in the last three years.
like in other sony phones, The front and back sides are very flat, while the sides are rounded with prominent corners. And it made of mostly from plastic, which means it feels less fancy than any other phones at this price.
It has the waterproof which is an advantage to buy this phone.
The display is so good and bright with more colors. The videos are playing like a gem.
Just like any other sony phones, Both front end and back cameras are superb, speakers are so vibrant and noise-free.
The battery is just 2600mhs which seems very low for a high-budget phone. The battery life is being claimed to be two days, but, it seems it is not upto that level, it drained fully with in a day for an average usage.