Latest Opera Mobile 25 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 9; Redmi Note 6 Pro Build/PKQ1.180904.001; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/107.0.5304.91 Mobile Safari/537.36 OPR/25.0.2254.116653 Android 9 Redmi Note 6 Pro
Mozilla/5.0 (Linux; U; Android 8.1.0; vivo 1808 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 OPR/25.0.2254.116653 Android 8 Y81
Mozilla/5.0 (Linux; U; Android 8.1.0; TECNO KA7 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 OPR/25.0.2254.116600 Android 8 Spark 2
Mozilla/5.0 (Linux; U; Android 8.1.0; TECNO F1 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 8 F1
Mozilla/5.0 (Linux; U; Android 8.1.0; SM-J260G Build/M1AJB; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.126 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 8 Galaxy J2 Core
Mozilla/5.0 (Linux; U; Android 8.1.0; Mi A2 Lite Build/OPM1.171019.019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 OPR/25.0.2254.116653 Android 8 Mi A2 Lite
Mozilla/5.0 (Linux; U; Android 8.1.0; itel A16 Build/OPM2.171019.012; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 8 A16
Mozilla/5.0 (Linux; U; Android 7.0; TECNO P701 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 7 DroidPad 7D
Mozilla/5.0 (Linux; U; Android 7.0; Beam Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/83.0.4103.96 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 7 Beam
Mozilla/5.0 (Linux; U; Android 7.0; Beam Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 7 Beam
Mozilla/5.0 (Linux; U; Android 7.0; ASUS_Z017DA Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/58.0.3029.83 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 7 ZenFone 3
Mozilla/5.0 (Linux; U; Android 6.0; ZTE BLADE A610 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/50.0.2661.86 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 6 Blade A610
Mozilla/5.0 (Linux; U; Android 6.0; Redmi Note 4 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/65.0.3325.109 Mobile Safari/537.36 OPR/25.0.2254.116653 Android 6 Redmi Note 4
Mozilla/5.0 (Linux; U; Android 6.0; LG-H502 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/49.0.2623.105 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 6 Magna
Mozilla/5.0 (Linux; U; Android 6.0.1; SM-G532G Build/MMB29T; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 6 Galaxy J2 Prime
Mozilla/5.0 (Linux; U; Android 6.0.1; SM-A510F Build/MMB29K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 6 Galaxy A5 (2016)
Mozilla/5.0 (Linux; U; Android 6.0.1; Redmi 4X Build/MMB29M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 6 Redmi 4X
Mozilla/5.0 (Linux; U; Android 5.1; Lenovo A1010a20 Build/LMY47I; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/50.0.2661.86 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 5 A Plus
Mozilla/5.0 (Linux; U; Android 5.1; A501 BRIGHT Build/LMY47D; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/43.0.2357.121 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 5 A501 Bright
Mozilla/5.0 (Linux; U; Android 5.1.1; SM-J120H Build/LMY47V; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 OPR/25.0.2254.116879 Android 5 Galaxy J1 (2016)