Xiaomi — Heat + performance drop

Address:	160055
Website:	Xiaomi.in

When I bought this phone it was already faulty heating issue performance drop, I replaced it once but still same issue with new handset too, then again I managed to replace, still the same issue still em going through it, it means mi4i is faulty mobile I think they launched it without testing, it's like cheating the customers by selling them a heater for winters worth rs13000/- not a smartphone, plz kindly arrange to fix it, replace mother board or in anyway jus fix it, kindly reply me on my email, [protected]@gmail.com