My iPhone screen was stuck on connecting to iTunes for a couple of hours and there is no sign back to normal. I tried rebooting the device, still the same result. The problem comes out when I remotely erase the device.
Wait a few days, then try to reboot it .
If your iPhone still stuck on connecting to iTunes screen , it is highly recommended that you use this tool,which is from Google :https://www.tunesbro.com/iphone-stuck-on-connect-to-itunes-screen.html
If it still doesn't work ,take it to the cell phone repair shop as soon as possible .