Thank you for reaching out to Samsung Community! We would like to inform that both On7 and On8 device have amazing set of features, you can choose the device that best suits your requirements. Regarding the device Upgrade, we suggest you to visit https://www.samsung.com/in/ and if the device is available with the Exchange offer, you can exchange the other device to purchase it.
Be sure to hit ♡ when you find an answer that works for you. For Further assistance, you can get in touch with us via Live Chat option by following- http://livechat.support.samsung.com/Customer_new/IN. You can also connect us via Samsung Members web community by following mentioned url-https://community.samsungmembers.com/en_IN#/
