high call quallty

I am super senior. moderately hearing impaired. i use phones mainly for talking to contacts and sending sms to contacts. I take very few photos., I am also not interested in other qualiltes of phone. I am NOT using phone for hearing music or using for interneet purposes because I have a laptop for internet. I do not want to buy not very costly phone, maximum Rs.40,000. which phone available in India you guys suggest?