Xiaomi India — redmi note 4,earphone problem when it is pinned on the phone

Address:

Thrissur, Kerala

Redmi note4, i have using this phone more one and half years, when the earphone is used in the time of call, earphone mic is not supported, i can hear voice, but people can't hear my voice, i tried many hear headphones, there is no use, i think it maybe mobile phone socket problem, i think it is lose connection in headphone socket, i want to know the expense to replace it