( Head phone symbol appears on display without connecting head phones)
This symptom in cell phones occurs with bad head phone connector or its related circuit. Usually Speaker and micro phone circuit will have separate circuit path in any cell phone. These two circuits will have relation in head phone circuit only.
The technical reason is, when head phones pin is inserted into cell phone head phone socket, You will observe head phone symbol or car symbol (in some cell phones) on the display area of cell phone, also you can observe the internal speaker and internal mic will be off, same time external speakers (in the head phones) and external mic ( in the head phones wire) are activated.
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