Sony Xperia M5 Aqua is defective!

I just upgraded to a Sony Xperia M5 Aqua, WORST CHOICE EVER!! After using the phone for about 5 days it started shutting down automatically and it only comes on when the charger is plugged in. I then sent it in for repairs and they replaced it with a new M5 from another batch. After using the new one for 3 days it also started doing the same thing. I sent that phone in for repairs and apparently they found no fault with that one, so frustrating!<br> <br> Such a waste. What's the point of using a phone that keeps shutting down and resets when it comes back on. U can't even carry it anywhere unless u have a power supply to plug it into. Stupid manufacturers, stupid Sony. I should have stuck to Samsung. This phone should be removed from the market as many people are experiencing the same problem.