Latest Opera Mobile 18 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 6.0; X9pro Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/44.0.2403.119 Mobile Safari/537.36 OPR/18.0.2254.106200 Android 6 X9 Pro
Mozilla/5.0 (Linux; U; Android 6.0; QMobile X700 PRO II Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/53.0.2785.124 Mobile Safari/537.36 OPR/18.0.2254.106543 Android 6 X700 Pro II
Mozilla/5.0 (Linux; U; Android 6.0; QMobile i2 POWER Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/53.0.2785.124 Mobile Safari/537.36 OPR/18.0.2254.106543 Android 6 i2 POWER
Mozilla/5.0 (Linux; U; Android 6.0; Micromax Q4220 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/72.0.3626.121 Mobile Safari/537.36 OPR/18.0.2254.106543 Android 6 Q4220
Mozilla/5.0 (Linux; U; Android 6.0; M350 Pro Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/54.0.2840.85 Mobile Safari/537.36 OPR/18.0.2254.106543 Android 6 M350 Pro
Mozilla/5.0 (Linux; U; Android 6.0; C3 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/53.0.2785.124 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 6 Unknown
Mozilla/5.0 (Linux; U; Android 6.0.1; Wileyfox Swift Build/MHC19Q; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/52.0.2743.98 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 6 Swift
Mozilla/5.0 (Linux; U; Android 6.0.1; Redmi 3S Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/53.0.2785.124 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 6 Redmi 3S
Mozilla/5.0 (Linux; U; Android 6.0.1; Nexus 5 Build/MOB30Y; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/52.0.2743.98 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 6 Nexus 5
Mozilla/5.0 (Linux; U; Android 5.1; A713_Vivo_Pro Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/48.0.2564.106 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 5 Unknown
Mozilla/5.0 (Linux; U; Android 5.1.1; SM-J320F Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 5 Galaxy J3 (2016)
Mozilla/5.0 (Linux; U; Android 5.1.1; SM-J320F Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/46.0.2490.76 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 5 Galaxy J3 (2016)
Mozilla/5.0 (Linux; U; Android 5.1.1; SM-J120F Build/LMY47X; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 OPR/18.0.2254.106454 Android 5 Galaxy J1 (2016)
Mozilla/5.0 (Linux; U; Android 5.1.0; Beeline Smart 5 Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.121 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 5 Smart 5
Mozilla/5.0 (Linux; U; Android 5.0.2; LG-K410 Build/LRX22G; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/52.0.2743.98 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 5 K10
Mozilla/5.0 (Linux; U; Android 5.0.1; ZTE T320 Build/LRX21M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/37.0.0.0 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 5 Blade GF3
Mozilla/5.0 (Linux; U; Android 5.0.1; LG-H502 Build/LRX21Y; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 5 Magna
Mozilla/5.0 (Linux; U; Android 4.4.4; Y635-L02 Build/HuaweiY635-L02; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 4 Y635
Mozilla/5.0 (Linux; U; Android 4.4.4; NEO 909 Build/KTU84P; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36 OPR/18.0.2254.106542 Android 4 Neo 909
Mozilla/5.0 (Linux; U; Android 4.4.4; D6603 Build/23.0.A.2.93; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36 OPR/18.0.2254.105561 Android 4 Xperia Z3