Why does my iphone screen keep controlling itself?

So my iphone is in horrible shape, in terms of a broken screen. It's having a hard time responding to touch and I can't type. Also, it keeps opening apps on its own. Someone told me that the screen is pressing up against the digitizer and is acting as if I was touching the screen due to the cracks. If so, can I just replace the broken screen or do I have to buy another phone? I want to wait on the iphone 6 to use my upgrade.

There are places that will replace the screen for you, a new phone isn't needed.

Your friend is probably right, or at least, it is a totally plausible guess. I would recommend replacing the screen first before you do anything else. If that does not fix the problem, try taking it to Apple and seeing if they can take a look at it.

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