Both the smartphones are likely to be priced between Rs 10,000 and Rs 20,000, industry sources told IANS.
The Galaxy J6+ is expected to come with dual rear cameras along with the support of an industry-first side fingerprint sensor.
The Galaxy J4+ is likely to come with a new "emotify' feature that would allow millennial users to express themselves better.
Earlier this year, Samsung launched Galaxy J8 and J6 mid-segment smartphones in India. In July this year, the South Korean tech giant reportedly sold over two million units of Galaxy J8 and J6 in the country.
"Galaxy J" is Samsung India's most successful smartphone brand.