iPhone Duo Troubleshooting Alert Message Issues
Guided steps to help resolve issues
Identify issues
Read the relevant support articles if you notice any of the following issues:
Temperature alert message appears on the display
Device or power adapter becomes unusually warm during use
Other alert message appears on the display
Relevant support articles
About the ‘Trust This Computer’ alert message on your iPhone, iPad, or iPod touch
If an ‘Accessory may not be supported alert’ appears on your Apple device
If the issue wasn’t resolved by following a support article, continue to the next section.
Try quick troubleshooting steps
Read the alert to determine the issue. Many alerts provide additional information or links to resolve the issue. Refer to relevant support articles for more information about the alert.
When the device is in use or charging, it’s normal for it to get warm. The exterior of the device acts as a cooling surface that transfers heat from inside the device to the cooler air outside. Refer to If your iPhone or iPad gets too hot or too cold if a temperature alert appears.
Note: Occasional temperature alerts are normal behavior and not necessarily a service issue. Low or high temperature conditions might cause the device to change its behavior to regulate its temperature, and this may include displaying a temperature alert message. Persistent temperature alerts appearing while the device is used in normal temperature conditions may be a service issue.
Important: If the device has been exposed to high temperature conditions, turn the device off and remove any covers or cases. Then move the device to a cooler environment. Allow the device to cool down before you continue to troubleshoot the issue.
Restart the iPhone. If the iPhone doesn’t restart, force restart the iPhone.
Run manual and diagnostic tests
If the issue wasn’t resolved by following a support article or trying the quick troubleshooting steps, run these diagnostic and manual tests to help isolate the cause of the issue:
While using the device, determine if the temperature warning screen continues to appear persistently:
Ensure that the device isn’t currently exposed to low or high temperature conditions and is between 0 to 35 degrees Celsius (32 degrees to 95 degrees Fahrenheit).
Verify that the device screen continues to display a persistent temperature alert.
Allow the device to return to normal temperature. This may take a few minutes.
If a persistent temperature alert continues to be displayed after the device reaches normal temperature, then service the device.
Run the Mobile Resource Inspector (MRI) diagnostic suite. Check diagnostic results to verify the presence of temperature warnings. If you’re unable to run MRI because the device is displaying a persistent temperature alert, service the device.
If the alert resulted from connecting an accessory to the iPhone with a cable, disconnect and reconnect the cable to ensure a good connection to the device. Disconnect and reconnect the connector in both orientations. Retest to determine if the alert message issue is resolved. If the alert message persists, service the device.
Open and inspect the iPhone
If the issue wasn’t resolved or isolated by following support articles or running diagnostic tests, refer to the iPhone repair manual to open and inspect the iPhone. A damaged or out-of-place part may be causing one of the issues.
Inspect all relevant internal flex cables and connectors for damage or tampering, such as a film or foreign material blocking a connector.
Note: This section requires ordering parts and tools. Replacing a part may not resolve the device’s issue. You can find other service options at support.apple.com/repair.
Replace the part
If the issue wasn’t resolved or isolated by following the previous steps, replace the following parts:
For cellular and Apple Pay alert issues, replace the logic board or I/O board, depending on diagnostic results.
For temperature alert issues, replace the logic board first, then replace the I/O board if the issue persists.
For unexpected noise issues and Ultra Wideband alert issues, replace the inner display assembly.
After the repair is completed, turn on the device and verify that the issue is resolved.
Note: This section requires ordering parts and tools. Replacing a part may not resolve the device’s issue. You can find other service options at support.apple.com/repair.