Chosen Solution
My zte keeps getting real hot from back of phone so hot scares me
bigmama50ers the very first thing is to remove the battery. Replace the battery with a new one and discard of the old one properly. Remember that heat always equals short circuit. Since it is at the back of the phone you most likely have a failed overcharging circuit in your battery which is an immediate fire hazard. ZTE ZMax Pro Battery Replacement Place the old battery in a tin can and leave it outside for a few days. There is nothing going to happen since it will be disconnected. After that you can dispose of it according to your state/community guidelines.
Another reason could be that the CPU being pushed to it’s limit could be the reason because I tend to notice the heat whenever I play a game on my ZMax Pro and it does literally turn into a hand warmer even if the charger is unplugged. And in this case, the heat can also be felt on the top of the screen. PCs and laptops have big enough heatsinks and often with a fan, most phones don’t have much in the way of cooling and that’s why they get hot in the hands too