4 
3 I hear echo during calls after water damage
Hi, I have an iphone 4 that got water damage after being in a place where there is a lot of humidity in the air. So the phone was damaged by water. I sent it to repair and now I hear echo during phone calls. Could it be because of the water damage? And, is there a way to fix it myself? Like clean some parts, or other process?
Thank you.
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