Latest Chrome Mobile 51 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.8481.1299 Mobile Safari/537.36 Android 8 Pixel 2
Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.9592.1424 Mobile Safari/537.36 iOS 11 iPhone
Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.3670.1668 Mobile Safari/537.36 Android 6 Nexus 5
Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.9937.1292 Mobile Safari/537.36 Android 6 Nexus 5
Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.5526.1455 Mobile Safari/537.36 Android 8 Pixel 2
Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.6725.1122 Mobile Safari/537.36 Android 6 Nexus 5
Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.9023.1838 Mobile Safari/537.36 iOS 11 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.4005.1782 Mobile Safari/537.36 iOS 11 iPhone
Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.3178.1279 Mobile Safari/537.36 iOS 11 iPhone
Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2948.1285 Mobile Safari/537.36 Android 8 Pixel 2
Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.4995.1977 Mobile Safari/537.36 Android 5 Galaxy S5
Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.3059.1848 Mobile Safari/537.36 Android 6 Nexus 5
Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.9337.1071 Mobile Safari/537.36 Android 5 Galaxy S5
Mozilla/5.0 (Linux; Android 5.0; SM-G900P Build/LRX21T) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.1600.1713 Mobile Safari/537.36 Android 5 Galaxy S5
Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.7815.1586 Mobile Safari/537.36 iOS 11 iPhone
Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.9345.1113 Mobile Safari/537.36 Android 8 Pixel 2
Mozilla/5.0 (iPhone; CPU iPhone OS 11_0 like Mac OS X) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.4561.1492 Mobile Safari/537.36 iOS 11 iPhone
Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.6215.1254 Mobile Safari/537.36 Android 8 Pixel 2
Mozilla/5.0 (Linux; Android 8.0; Pixel 2 Build/OPD3.170816.012) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.9536.1583 Mobile Safari/537.36 Android 8 Pixel 2
Mozilla/5.0 (Linux; Android 6.0; Nexus 5 Build/MRA58N) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.7584.1717 Mobile Safari/537.36 Android 6 Nexus 5