https://qooah.com/2011/11/24/%e6%97%a5%e6%9c%ac-ntt-docomo-%e4%bb%8a%e5%a4%a9%e7%99%bc%e4%bd%88%e6%97%a5%e6%9c%ac%e9%a6%96%e9%83%a8-lte-4g-%e6%89%8b%e6%a9%9f-galaxy-sii-lte-sc-03d/