High clock speeds on the Snapdragon 600 cause heat.
The HTC One M7 has a known design flaw: poor thermal paste application. Consider reapplying thermal paste (Thermal Grizzly Kryonaut) between the screen assembly and the aluminum unibody. This can turn the entire back into a heatsink. spiderm7 rom hot
Dirty flashing or using heavy Substratum themes can cause system UI overhead → heat. Clean flash the ROM without mods to isolate the issue. High clock speeds on the Snapdragon 600 cause heat
If you like customization but want lower temperatures, consider: The HTC One M7 has a known design
| ROM | Thermal Profile | Performance | |-----|----------------|-------------| | Pixel Experience | Cool | Moderate | | LineageOS | Very cool | Balanced | | crDroid | Warm (less than Spiderm7) | High | | ArrowOS | Cool | Balanced | | Evolution X | Moderate | High |