Last Updated: May 16, 2014
This article helps troubleshoot your Apple iPhone 4 slowing, freezing, locking up, turning off, or power cycling unexpectedly.
You may have performance issues if your device:
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.
A soft reset deletes any temporary files that may be causing the issue.
Verify if low storage space is an issue on your Apple iPhone 4.
Performance issues can arise when the device has low internal memory. Troubleshoot low memory issues.
Some applications continue to run in the background after you exit that application and can cause performance issues.Sprint recommends that you close background applications when you're not using them.
If the performance issues began after you installed a particular application, try uninstalling it. See if the issue is resolved.
Some applications that Sprint doesn't support may freeze or slow your device's performance.
The download process may require you to accept a variety of permissions that allow the application to control or modify your operating system.
Note: To optimize device performance, be sure the device is running the most recent device software. Check for software updates.