Hi,

Try the Chosen Solution in this link first to see if it resolves the problem.

My huawei y625 has Stuck in headset mode completely.how do I fix this

I realize that it is not for your particular model phone but the principle is the same in testing and trying to fix it.

If it doesn’t work then here’s a link to the Samsung Galaxy S4 Mini guide, which will allow you to gain access to the headphone socket so that it can be replaced, they cannot be repaired