Older models of either Google or Oneplus phones seem fine, I have been using a Nexus 6p with no problems other than some battery life but that's expected given how long it's been used.
Replace it sooner than later... my 6p's battery lost a lot of life, charging became irratic, then it literally caught fire when the tech was replacing the screen and battery. Now on a Pixel 2 XL (since I couldn't wait for the 6p replacement at the time).