I noticed last winter in Seoul. I could barely use my iPhone 6S Plus outside. I had to regularly walk in stores and blow on its back to warm it up. Super annoyi

I noticed last winter in Seoul. I could barely use my iPhone 6S Plus outside. I had to regularly walk in stores and blow on its back to warm it up. Super annoying when it turned off at the peak of a mountain and I couldn't turn it on until I was half-way down. It doesn't tell you why it turns off either, I thought the battery was dead when it started regularly turning off around 20-40%