If your iPhone 5 gives you an error every time you try to connect to a wifi network, it's possible that the wifi antenna itself is at fault.
If the battery in your iPhone 5c just isn't what it used to be, it may be time for a new battery.
If you've got an iPhone 5c that just doesn't seem to vibrate no matter what mode you have it in, it's possible that the vibrator assembly itself is defective or blown.
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