Latest Mobile Silk 70 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 7.1.2; KFMUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.3.1 like Chrome/70.0.3538.80 Safari/537.36 Fire OS 6 Fire 7" (2019)
Mozilla/5.0 (Linux; Android 7.1.2; KFGIWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.3.1 like Chrome/70.0.3538.80 Safari/537.36 Fire OS 6 Fire HD 8 (2016)
Mozilla/5.0 (Linux; Android 5.1.1; KFTBWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.5.1 like Chrome/70.0.3538.110 Safari/537.36 Fire OS 5 Fire HD 10
Mozilla/5.0 (Linux; Android 5.1.1; KFTBWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.4.2 like Chrome/70.0.3538.80 Safari/537.36 Fire OS 5 Fire HD 10
Mozilla/5.0 (Linux; Android 5.1.1; KFTBWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.2.2 like Chrome/70.0.3538.64 Safari/537.36 Fire OS 5 Fire HD 10
Mozilla/5.0 (Linux; Android 5.1.1; KFSUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.5.1 like Chrome/70.0.3538.110 Safari/537.36 Fire OS 5 Fire HD 10 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFSUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.4.2 like Chrome/70.0.3538.80 Safari/537.36 Fire OS 5 Fire HD 10 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFGIWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.4.2 like Chrome/70.0.3538.80 Safari/537.36 Fire OS 5 Fire HD 8 (2016)
Mozilla/5.0 (Linux; Android 5.1.1; KFFOWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.4.2 like Chrome/70.0.3538.80 Safari/537.36 Fire OS 5 Fire 7"
Mozilla/5.0 (Linux; Android 5.1.1; KFFOWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.2.2 like Chrome/70.0.3538.64 Safari/537.36 Fire OS 5 Fire 7"
Mozilla/5.0 (Linux; Android 5.1.1; KFDOWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.5.1 like Chrome/70.0.3538.110 Safari/537.36 Fire OS 5 Fire HD 8 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFDOWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.4.2 like Chrome/70.0.3538.80 Safari/537.36 Fire OS 5 Fire HD 8 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFAUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.5.1 like Chrome/70.0.3538.110 Safari/537.36 Fire OS 5 Fire HD 7 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFAUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.4.2 like Chrome/70.0.3538.80 Safari/537.36 Fire OS 5 Fire HD 7 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFAUWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.2.2 like Chrome/70.0.3538.64 Safari/537.36 Fire OS 5 Fire HD 7 (2017)
Mozilla/5.0 (Linux; Android 5.1.1; KFASWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.5.1 like Chrome/70.0.3538.110 Safari/537.36 Fire OS 5 Fire HD 7
Mozilla/5.0 (Linux; Android 5.1.1; KFARWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.5.1 like Chrome/70.0.3538.110 Safari/537.36 Fire OS 5 Fire HD 6
Mozilla/5.0 (Linux; Android 5.1.1; AFTM) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.1.93 like Chrome/70.0.3538.64 Safari/537.36 Fire OS 5 Fire TV Stick
Mozilla/5.0 (Linux; Android 4.4.3; KFTHWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.5.1 like Chrome/70.0.3538.110 Safari/537.36 Fire OS 4 Kindle Fire HDX 7" WiFi
Mozilla/5.0 (Linux; Android 4.4.3; KFTHWI) AppleWebKit/537.36 (KHTML, like Gecko) Silk/70.4.2 like Chrome/70.0.3538.80 Safari/537.36 Fire OS 4 Kindle Fire HDX 7" WiFi