Why do mi phone blasts?

Not only Mi phones but all smartphones which has faced this scenario is due to some common problems. Mostly it happens due to battery. Those reasons are here.

• Cheap battery or second quality battery which features microscopic particles when charging that leads to cause a internal short circuit in the battery cells which lead to explosion. Galaxy Note 7 explosive scenario was due to this problem.
• Dropping a phone can make a break in battery which leads to internal cells short circuit.
• Over charging your phone might lead to this.
• Phone temperature is also one of the reasons which causes a battery swell or chemical leakage that ultimately causes a blast.
• Environment temperature also plays a role here.

Hope it helps!