Hey there, jetmir44,
Thanks for stopping by the Apple Support Communities. I understand from your post that your iPhone won't boot as expected. It will display the Apple logo and a loading bar, but won't actually get to your Lock screen. I'm happy to help!
Based on what you've described, I'd recommend that you use the "Put your device in recovery mode and set it up again" section of If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support.
Even if you've tried these steps, it may be worth while to try them again. When you place your device in recovery mode, it downloads the iOS software. If that download takes longer than 15 minutes, your iPhone will exit recovery mode and won't actually reinstall the iOS software once the download is finished.
If you've tried more than once and the issue does continue, however, please get in touch with Apple Support directly: Contact Apple Support.
Enjoy your weekend!
