iPhone stops working when I receive calls

Thanks for clearing that up Moantar,

So you're saying that when you go to answer a call, the screen goes dark when you hold the iPhone to your ear, but when you finish the call and go to hang up, the screen does not light back up and is unresponsive when pressing the power button.

We'd suggest making sure there isn't anything interfering with the light sensor first. If you're using any screen protectors or cases, try taking them off and seeing if the behavior continues. If it stops, then the issue is that the accessory was blocking the sensor. If the issue continues, we'd recommend reaching out to Apple directly for additional troubleshooting assistance using: Official Apple Support

Hope that helps.

Take care.

Hello Moantar,

Welcome to Apple Support Communities!

If we understand your post correctly, whenever a call comes in the Lock Screen comes on. We'd like to help!

Let's go through the Lock Screen settings to ensure they are set to how you want them.

"The Lock Screen—which shows the current time and date, your most recent notifications, and a photo or any custom widgets you’ve added—appears when you turn on or wake iPhone. From the Lock Screen, you can see notifications, open Camera and Control Center, get information from your favorite apps at a glance, and more.

Access features and information from the Lock Screen

You can quickly access useful features and information from the Lock Screen, even while iPhone is locked. From the Lock Screen, do any of the following:

• Open Camera: Swipe left. On supported models, you can touch and hold , then lift your finger. (See iPhone camera basics.)
• Open Control Center: Swipe down from the top-right corner (on an iPhone with Face ID) or swipe up from the bottom edge of the screen (on other iPhone models). (See Use and customize Control Center on iPhone.)
• See earlier notifications: Swipe up from the center. (See View and respond to notifications on iPhone.)
• View widgets: Swipe right. (See Add widgets on iPhone.)

To choose what you can access from the Lock Screen, see Control access to information on the iPhone Lock Screen.

Show notification previews on the Lock Screen

1. Go to Settings  > Notifications.
2. Tap Show Previews, then tap Always.
3. Choose how you want notifications displayed on the Lock Screen:

• View just the number of notifications: Select Count.
• View the notifications grouped into stacks by app: Select Stack.
• View the notifications in a list: Select List.

1. You can pinch the notifications on the Lock Screen to change the layout.

Notification previews can include text from Messages, lines from Mail messages, and details about Calendar invitations. See View and respond to notifications on iPhone.

View Live Activities on the Lock Screen

You can view Live Activities on your Lock Screen—including live sports updates, order updates, and music playing—so you can follow along right on your Lock Screen."

Let us know if you have any questions.

Thank you for using Apple Support Communities.

Take care!