How do I fix a phone that won’t turn on?

Things to try:

1. Ensure phone has ample charge
2. Plug phone into a wall charger and check charge levels
3. Perform a soft reset of the device
4. Attempt a hard reset of the device
5. Check and ensure all cables and adapters are securely attached and in working order
6. Ensure phone is properly running any existing updates
7. Check phone compatibility with device service provider