10.11. Troubleshooting
It seems like no matter what technology you are talking about there are going to be a number of troubleshooting steps that are always appropriate, almost no matter what the end user's symptom is. For example, is the hardware working as intended? Will the iPhone make a phone call? Is the service plan still active for the device?
If a device will not power on, try plugging it into a power source to check the battery. If the device is on and running, but otherwise unresponsive, you can try to force quit the frontmost application. To accomplish this, press and hold the lock button until the Shutdown Slider appears. At this point, press and hold the home button for a second or two until the front most application quits. This ...
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