This article helps troubleshoot making or receiving calls on your iPhone 11 Pro Max

You may have issues with calls if you have:

• A low signal strength
• Trouble making or receiving calls
• Frequently dropped calls

These steps help identify and resolve the underlying cause. After completing each step, test to see if the issue is fixed. If not, continue to the next step.

1. Verify airplane mode is turned off.
   
   
   1. From the home screen, swipe down from the top right hand corner of the screen to open the Control Center settings.
   2. Turn off Airplane mode if enabled.

      Note: The icon is orange when enabled.

2. Verify mobile data is enabled.
   
1. From the home screen, tap Settings.
2. Tap Cellular.
3. Ensure Cellular Data is enabled.

3. Verify if coverage is available at your current location.

   If your iPhone 11 Pro Max has low signal strength, see if your location is within Sprint voice coverage on the Sprint coverage map.

4. Reset the network settings.

   Resetting the network settings reconnects your phone to the Sprint network and does not erase any of your content or data.

1. From the home screen, tap Settings.
2. Scroll to and tap General.
3. Scroll to and tap Reset.
4. Tap Reset Network Settings.
5. Tap Reset Network Settings to confirm.
6. Network Settings have been reset.

5. Do you know if other Sprint customers are experiencing the same issue in the same location?
   
   

   1. If yes or you don't know: Please contact Sprint for help.
   2. If no: Please find the nearest Sprint Store and schedule an appointment so a Sprint technician can further diagnose the issue.

Note: To optimize device performance, be sure your iPhone 11 Pro Max is running the most recent device software. Check for software updates.

If you're still having issues, please contact Sprint Customer Care for more help.