Karbon is the smartphone brand. They are not as famous as the other brands. I hate K9 because of its design and look. Its look like crest and give worst feeling. User interface is not Clear and the complicated to understand the GuI. I hate it because it give me problem after 30 days of buy.
I suggest you to dont buy such stupid smartphone try to give smartphone of companies samsung apple oppo lg and HtC . So please waste your money on auch product collect some extra money and get better one