Latest Epik One Pebble X400 user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; Android 8.1.0; X400) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.110 Mobile Safari/537.36	Chrome Mobile 70	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; X400 Build/OPM2.171019.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.132 Mobile Safari/537.36	Chrome Mobile 80	Android 8