Latest Opera Mobile 15 user agents:

User Agent Platform Device
Mozilla/5.0 (Linux; Android 4.4.4; GT-I9300I Build/KTU84P) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.60140 Android 4 Galaxy S III
Mozilla/5.0 (Linux; Android 4.4.2; LG-X145 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 L60
Mozilla/5.0 (Linux; Android 4.3; GT-I9300 Build/JSS15J) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Galaxy S III
Mozilla/5.0 (Linux; Android 4.2.2; GT-I9500 Build/JDQ39) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Galaxy S4
Mozilla/5.0 (Linux; Android 4.2.1; IQ450_Quattro Build/JOP40D) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.45 Mobile Safari/537.36 OPR/15.0.1162.59192 Android 4 Horizon 2
Mozilla/5.0 (Linux; Android 4.1.2; Xperia S Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Xperia S
Mozilla/5.0 (Linux; Android 4.1.2; Micromax A92 Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 A92
Mozilla/5.0 (Linux; Android 4.1.2; IQ451 Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.60140 Android 4 Vista
Mozilla/5.0 (Linux; Android 4.1.2; GT-S7390 Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Galaxy Trend Lite
Mozilla/5.0 (Linux; Android 4.1.2; GT-S6312 Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Galaxy Young DUOS
Mozilla/5.0 (Linux; Android 4.1.2; GT-S5310 Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Galaxy POCKET Neo
Mozilla/5.0 (Linux; Android 4.1.2; GT-I9300 Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Galaxy S III
Mozilla/5.0 (Linux; Android 4.1.2; GT-I9300 Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.60140 Android 4 Galaxy S III
Mozilla/5.0 (Linux; Android 4.1.2; GT-I9100 Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Galaxy S II
Mozilla/5.0 (Linux; Android 4.1.2; GT-I8190 Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Galaxy S III mini
Mozilla/5.0 (Linux; Android 4.1.2; EK-GC100 Build/JZO54K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.60140 Android 4 Galaxy Camera
Mozilla/5.0 (Linux; Android 4.1.1; HTC One S Build/JRO03C) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 One S
Mozilla/5.0 (Linux; Android 4.0.4; ST21i Build/11.0.A.4.22) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Xperia tipo
Mozilla/5.0 (Linux; Android 4.0.4; SCH-S738C Build/IMM76D) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 Galaxy Centura
Mozilla/5.0 (Linux; Android 4.0.4; Philips W832 Build/IMM76D) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.63 Mobile Safari/537.36 OPR/15.0.1162.61541 Android 4 W832