Gionee unveiled the narrowest 5.5" metal phone yet - just 74.9mm wide. Meet the Gionee S8. The company called out the iPhone 6s Plus, Huawei's Mates, the Oppo R7s as examples of wider phones.
Source: http://www.gsmarena.com/gionee_s8_mwc_2016-review-1395.php