Hey there Colet,
It sounds like your iPhone is unexpectedly restarting on you for some reason. I would try the troubleshooting steps oulined in this article named:
iPhone: Hardware Troubleshooting
- Verify that the Sleep/Wake button functions. If it does not function, inspect it for signs of damage. If the button is damaged or is not functioning when pressed, seek service.
- Check if a Liquid Contact Indicator (LCI) is activated or there are signs of corrosion. Learn about LCIsand corrosion.
- Connect the iPhone to the iPhone's USB power adapter and let it charge for at least ten minutes.
- After at least 30 minutes, if:
- The home screen appears: The iPhone should be working. Update to the latest version of iOS if necessary. Continue charging it until it is completely charged and you see this battery icon in the upper-right corner of the screen . Then unplug the phone from power. If it immediately turns off, seek service.
- The low-battery image appears, even after the phone has charged for at least 20 minutes: See "iPhone displays the low-battery image and is unresponsive" symptom in this article.
- Something other than the Home screen or Low Battery image appears, continue with this article for further troubleshooting steps.
- If the iPhone did not turn on, reset it while connected to the iPhone USB power adapter.
- If the display turns on, go to step 4.
- If the display remains black, go to next step.
- Connect the iPhone to a computer and open iTunes. If iTunes recognizes the iPhone and indicates that it is in recovery mode, attempt to restore the iPhone. If the iPhone doesn't appear in iTunes or if you have difficulties in restoring the iPhone, see this article for further assistance.
- If restoring the iPhone resolved the issue, go to step 4. If restoring the iPhone did not solve the issue, seek service.
Thank you for using Apple Support Communities.
All the best,
Thanks for the attempted answer, Sterling. However, that troubleshooting checklist is irrelevant to the issue some of us are having.
I am experiencing experiencing a similar phenomenon with my iPhone 5. It will simply crash, hard and randomly. At first, it was very random; occurring maybe once per week or every few days. However, it has gotten to the point where it does so almost daily.
The crash is manifest as an unresponsive phone. If I press and hold the 'Home' button, the device suggests that it has reached a critically low power level presenting the 'Low Battery Indicator') and entered hybernation. Colet's suggestion that "[p]owering off the unit and turning back on used to fix the problem" has never been an option for me. The only solution has been to attach a Lightening cable to a power source. The phone then awakes from hybernation and resumes 'normal' operation.
Very rarley has this occurred as a result of the phone depleating its internal battery. In fact, it has occurred with power levels ranging from 13% to 93%. It seems to be an issue with the iPhone PMU (or its analog).
I have tried various methods to determine the cause of the anomaly. One predominant factor is the use of a GPS tracking app (e.g., Endomondo), but not always. This morning, I was simply walking up an internal staircase listening to a podcast. When it stopped, I first assumed that it simply lost the streaming source. However, when i arrived at my desk and attempted to restart the podcast stream, I discoverd that the device had crashed. Attaching it to power immediately revived the phone, which indicated an 88% charge state.