Why is my iPhone 3rd generation not charging?

Why is my iPhone 3rd generation not charging?

Might be the cable if you have upgraded to ios 5.1 or higher the cable might not work happened to me too

I had the same problem! For me, it was the charger. But my friend also experienced this and it was not her charger. Just simply wouldnt charge! So she turned it off and then pressed the on button and home middle button at the same time really hard and it turned on, and started charging. It might not work, but it did for her, 2 times

It's either two electrical sources:
1) The cable.
2) The socket its plugged into.

It all depends on how old your cable is. If it has moderate to severe wear and tear on it (i.e.exposing wires), its time to replace the cable. Check the power socket you used. That's always a deal breaker. And if none of the tests above proved anything, Hard reset the iPhone. You hold the Home+Power buttons until it restarts. No data is lost in this. And, if none of the suggestions have worked, Take the phone to Apple and let them know. They will cover it because it's a defect, unless you had some accident with the phone (i.e.liquids).

I would try what the others said and if that doesn't work, do a full backup and restore everything

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