Iphone updating and home button problems?

So i keep having problems with my iPhone 3G. The home button doesn't work often and most of the times it works without me even pressing it, more like a ghost keeps pressing it. How to solve this? Should i reset my settings? Would that help? Or should i update my iPhone. I've tried updating it tho like about 5 times but whenever the updating is about to end, it says Error occurred. How can i update it and how can i find a solution on fixing my home button?

There's a way you can get your home button on your actual screen. It just sits on your screen and you just touch it when you want to go back to the the home screen. Just search on Google or something how to do it

You should be ashamed having such an old iphone, can't you see the line in front of apple store, bad apple fan, bad apple fan! XD

Have the iphone checked out as it might not be the software issue in this case.

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