Latest Opera Mobile 57 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 9; TECNO AB7 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/93.0.4577.82 Mobile Safari/537.36 OPR/57.0.2254.57961 Android 9 Phantom 9
Mozilla/5.0 (Linux; U; Android 9; TECNO AB7 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/92.0.4515.159 Mobile Safari/537.36 OPR/57.0.2254.57961 Android 9 Phantom 9
Mozilla/5.0 (Linux; U; Android 9; SM-A205F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/90.0.4430.210 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 9 Galaxy A20
Mozilla/5.0 (Linux; U; Android 9; itel W6004P Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/92.0.4515.159 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 9 A56 Pro
Mozilla/5.0 (Linux; U; Android 9; itel W6004P Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.116 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 9 A56 Pro
Mozilla/5.0 (Linux; U; Android 9; itel W5005 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/77.0.3865.92 Mobile Safari/537.36 OPR/57.0.2254.57773 Android 9 P15
Mozilla/5.0 (Linux; U; Android 8.1.0; VFD320 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 8 Smart C9
Mozilla/5.0 (Linux; U; Android 8.1.0; TECNO LA7 Pro Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 8 Pouvoir 2 Pro
Mozilla/5.0 (Linux; U; Android 8.1.0; TECNO F2LTE Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.120 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 8 F2 LTE
Mozilla/5.0 (Linux; U; Android 8.1.0; Nomi_C101034 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.101 Mobile Safari/537.36 OPR/57.0.2254.57835 Android 8 Ultra 4 LTE
Mozilla/5.0 (Linux; U; Android 8.1.0; itel W6001 Build/OPM2.171019.012; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 8 P33 Plus
Mozilla/5.0 (Linux; U; Android 8.1.0; FENDY_DS Build/OPM2.171019.012; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 OPR/57.0.2254.58130 Android 8 Fendy DS
Mozilla/5.0 (Linux; U; Android 8.0.0; Infinix X608 Build/OPR1.170623.032; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.120 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 8 Hot 6 Pro
Mozilla/5.0 (Linux; U; Android 7.1.1; KYV42 Build/1.050AL.35.a; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 OPR/57.0.2254.58133 Android 7 Qua Phone QX
Mozilla/5.0 (Linux; U; Android 7.0; TECNO WX3P Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.88 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 7 WX3 Pro
Mozilla/5.0 (Linux; U; Android 7.0; TECNO R6S Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.120 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 7 R6S
Mozilla/5.0 (Linux; U; Android 7.0; TECNO CA6 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/94.0.4606.71 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 7 Camon CM
Mozilla/5.0 (Linux; U; Android 7.0; Hammer Energy Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/91.0.4472.101 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 7 Energy
Mozilla/5.0 (Linux; U; Android 6.0; MEIZU_M5 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/44.0.2403.147 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 6 M5
Mozilla/5.0 (Linux; U; Android 6.0; K10000 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/44.0.2403.119 Mobile Safari/537.36 OPR/57.0.2254.58007 Android 6 K10000