Latest Opera Mobile 31 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; U; Android 9; SM-A207F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 9 Galaxy A20s
Mozilla/5.0 (Linux; U; Android 9; SM-A107F Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/74.0.3729.136 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 9 Galaxy A10s
Mozilla/5.0 (Linux; U; Android 9; itel W6002 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.116 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 9 S15
Mozilla/5.0 (Linux; U; Android 9; Infinix X653 Build/PPR1.180610.011; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/79.0.3945.116 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 9 Smart 4
Mozilla/5.0 (Linux; U; Android 8.1.0; TECNO BA2 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 8 Pop 2 Plus
Mozilla/5.0 (Linux; U; Android 8.1.0; itel A16 Plus Build/OPM2.171019.012; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 8 A16 Plus
Mozilla/5.0 (Linux; U; Android 8.1.0; Infinix X571 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/92.0.4515.159 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 8 Note 4 Pro
Mozilla/5.0 (Linux; U; Android 8.1.0; Infinix X571 Build/O11019; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/76.0.3809.132 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 8 Note 4 Pro
Mozilla/5.0 (Linux; U; Android 8.0.0; WAS-LX1 Build/HUAWEIWAS-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/120.0.6099.116 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 8 P10 Lite
Mozilla/5.0 (Linux; U; Android 7.1.2; Redmi 4X Build/N2G47H; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/66.0.3359.158 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 7 Redmi 4X
Mozilla/5.0 (Linux; U; Android 7.1.2; Moto E Build/NJH47F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.78 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 7 Moto E
Mozilla/5.0 (Linux; U; Android 7.1.2; LG-D405n Build/NJH47B; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/59.0.3071.92 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 7 L90
Mozilla/5.0 (Linux; U; Android 7.1.1; ZC554KL Build/NMF26F; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/63.0.3239.111 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 7 ZenFone 4 Max
Mozilla/5.0 (Linux; U; Android 7.0; WAS-LX1 Build/HUAWEIWAS-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 7 P10 Lite
Mozilla/5.0 (Linux; U; Android 7.0; WAS-LX1 Build/HUAWEIWAS-LX1; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 7 P10 Lite
Mozilla/5.0 (Linux; U; Android 7.0; vivo Y17T Build/JDQ39) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30 OPR/31.0.2254.121393 Android 7 Y17T
Mozilla/5.0 (Linux; U; Android 7.0; TECNO CA6 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/92.0.4515.131 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 7 Camon CM
Mozilla/5.0 (Linux; U; Android 7.0; TECNO CA6 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/86.0.4240.198 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 7 Camon CM
Mozilla/5.0 (Linux; U; Android 7.0; TECNO CA6 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/64.0.3282.137 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 7 Camon CM
Mozilla/5.0 (Linux; U; Android 7.0; TECNO CA6 Build/NRD90M; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/103.0.5060.70 Mobile Safari/537.36 OPR/31.0.2254.122029 Android 7 Camon CM