What to do if your cell phone doesn't start?

Unfortunately I have a big problem, my cell phone, an Honor (subsidiary of Huawei) does not start anymore. The cell phone is an Android and it just doesn't start anymore, there always comes the honor animation, where after the animation the cell phone should start as always. I have already taken out the battery and the SIM card and put it back in, then I went back and started. I was able to use everything very well, but it showed me twice a minute that the phone manager had crashed, has that got nothing to do with not starting? Then I wanted to test whether the cell phone starts again, so I turned it off and started it again, but it doesn't start again. In addition, the cell phone is very warm and charging doesn't help, which makes the cell phone even hotter. So what can I do now? I can't get the battery and the SIM card out and in every time and simply not switching off the cell phone would probably not be good in the long run. Or should I kick the cell phone in the bin and give up? Maybe the cell phone is completely broken now, I have had the cell phone for 2 years and in my opinion have always looked after it well, but what to say that it is a used cell phone. I appreciate any help👍

Just leave it alone and get a new one. The cell phone probably has it behind. And with the prices for a repair, you can also confidently buy a new one.

In this case it is recommended to reload the program. I can't say how this is done with your cell phone.

Have you recently installed a new app, open on the left, that you didn't know? I recommend you to turn on the smartphone in safe mode, so all applications are deactivated and you can delete them. To do this, press the power button and the volume up button at the same time, the logo appears, let go of the power test, but hold the volume up button until the lock screen appears.

Charge fully once. Otherwise wait. In the worst case, hard reset. Key combination when switching on.

Do a hard reset in front of the bin - but then the data will be gone.

Simultaneously press the "louder" and power button until it starts.
Then use the buttons to go to "wipe data / factory reset" and press the power button and confirm again if necessary.
Then "reboot system now" and see what happens.
If it still doesn't work - ton.