Latest Ergo Prime B400 user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; Android 4.4.2; Prime B400 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/30.0.0.0 Mobile Safari/537.36	Chrome Webview 30	Android 4
Mozilla/5.0 (Linux; Android 4.4.2; Prime B400 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 YaBrowser/17.10.2.135.00 Mobile Safari/537.36	Yandex Browser 17	Android 4