Latest MicroMax Spark 4G (2017) user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; U; Android 8.1.0; Micromax Q409A Build/OPM2.171019.012; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/68.0.3440.91 Mobile Safari/537.36 OPR/44.1.2254.143215	Opera Mobile 44	Android 8
Mozilla/5.0 (Linux; U; Android 8.1.0; en-US; Micromax Q409A Build/OPM2.171019.012) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/57.0.2987.108 UCBrowser/13.0.8.1291 Mobile Safari/537.36	UC Browser 13	Android 8
Mozilla/5.0 (Linux; U; Android 8.1.0; en-US; Micromax Q409A Build/OPM2.171019.012) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/57.0.2987.108 UCBrowser/12.12.9.1226 Mobile Safari/537.36	UC Browser 12	Android 8
Mozilla/5.0 (Linux; U; Android 7.0; en-US; Micromax Q409 Build/NRD90M) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/57.0.2987.108 UCBrowser/12.8.0.1120 Mobile Safari/537.36	UC Browser 12	Android 7
Mozilla/5.0 (Linux; U; Android 6.0; en-US; Micromax Q409 Build/MRA58K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 UCBrowser/10.8.8.730 U3/0.8.0 Mobile Safari/534.30	UC Browser 10	Android 6
Mozilla/5.0 (Linux; arm; Android 6.0; Micromax Q409) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/81.0.4044.138 YaBrowser/20.6.3.54.00 SA/1 Mobile Safari/537.36	Yandex Browser 20	Android 6
Mozilla/5.0 (Linux; arm; Android 6.0; Micromax Q409) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.122 YaBrowser/20.3.0.276.00 Mobile SA/1 Safari/537.36	Yandex Browser 20	Android 6
Mozilla/5.0 (Linux; arm; Android 6.0; Micromax Q409) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.136 YaBrowser/20.2.6.114.00 Mobile SA/1 Safari/537.36	Yandex Browser 20	Android 6
Mozilla/5.0 (Linux; arm; Android 6.0; Micromax Q409) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.136 YaBrowser/20.2.5.140.00 Mobile SA/1 Safari/537.36	Yandex Browser 20	Android 6
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.88 Mobile Safari/537.36	Chrome Mobile 91	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.210 Mobile Safari/537.36	Chrome Mobile 90	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Mobile Safari/537.36	Chrome Mobile 89	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.93 Mobile Safari/537.36	Chrome Mobile 88	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.152 Mobile Safari/537.36	Chrome Mobile 88	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.141 Mobile Safari/537.36	Chrome Mobile 88	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.141 Mobile Safari/537.36	Chrome Mobile 87	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.101 Mobile Safari/537.36	Chrome Mobile 87	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.99 Mobile Safari/537.36	Chrome Mobile 86	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Mobile Safari/537.36	Chrome Mobile 86	Android 8
Mozilla/5.0 (Linux; Android 8.1.0; Micromax Q409A) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.185 Mobile Safari/537.36	Chrome Mobile 86	Android 8