My iPhone won't update/install anything. What do I do?

So i have an Iphone 4. When I try to install something, it says "unable to install" I try to update my phone too! It says the same thing!

I would say to hard set the iphone if that doesn't work the internals could be defective which would be marked as a factory defect and if that's the case you should take it into the apple store explain your situation to them and they may be able to replace your device.

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