The operating temperature of a Smartphone shall not be something way down than 0 degree Celsius. Well, at least if it gets frozen into a lake, it should not survive but, the Huawei Mate 10 Pro made itself an exception.
Someone actually found a Mate 10 Pro that somehow got frozen in the upper surface of a Frozen Lake & when it was found, there was an incoming call in the device.
Definitely the phone was alive & seeing it to receive call signals in that frozen state indicates that Huawei has actually thrown in some really good build quality & shielding in the device.
So, not sure if this thing is true with all the Mate 10 Pro units but, if it is & if you have a Mate 10 Pro, you should be safe in bad weather conditions.