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OS Android 6.0 (Marshmallow), Clean Pure Stock Android with Zero Bloatware
Chipset Spreadtrum SC7731C (28 nm 1.2GHz Quad-Core 32-bit Cortex-A7 Processor with Mali-400 MP2 GPU @ 500MHz)
RAM 512MB RAM
Storage 8GB
Display 4.0 inches • 480 x 800 pixels (5:3 aspect, Compact 4.0" WVGA 480p TN LCD Display, 233 ppi)
Main camera Pro 2.0 MP Rear Camera with Autofocus, LED flash & 720p Video: 2.0 MP (autofocus, 720p@30fps HD video recording) with High-Power LED flash
Selfie camera 0.3 MP VGA Front Camera for Video Calls & Skype (480p)
Battery Monumental 2500 mAh Colossal Monster Battery! (Removable Li-Ion, swappable on the go! Powers over 22 hours calling / 450 hours standby / 10 hours continuous video / 50 hours audio!), 5W Charging via Micro-USB (5V/1A in box!) + Power Saver • Removable Li-Ion (2500mAh Monster, swappable on the go!)
Weight 125 g (4.41 oz)

Latest Fero A4001 Plus user agents:

User Agent Browser Platform
Mozilla/5.0 (Linux; U; Android 6.0; en-US; Fero A4001 Plus Build/MRA58K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 UCBrowser/12.13.5.1209 U3/0.8.0 Mobile Safari/534.30 UC Browser 12 Android 6A4001 Plus
Mozilla/5.0 (Linux; U; Android 6.0; en-US; Fero A4001 Plus Build/MRA58K) AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 UCBrowser/12.13.5.1209 (SpeedMode) U4/1.0 UCWEB/2.0 Mobile Safari/534.30 UC Browser 12 Android 6A4001 Plus
Mozilla/5.0 (Linux; Android 6.0; Fero A4001 Plus Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.110 Mobile Safari/537.36 Chrome Webview 70 Android 6A4001 Plus
Mozilla/5.0 (Linux; Android 6.0; Fero A4001 Plus Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/55.0.2883.91 Mobile Safari/537.36 Chrome Webview 55 Android 6A4001 Plus
Mozilla/5.0 (Linux; Android 6.0; Fero A4001 Plus Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.101 Mobile Safari/537.36 Chrome Mobile 91 Android 6A4001 Plus
Mozilla/5.0 (Linux; Android 6.0; Fero A4001 Plus Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.72 Mobile Safari/537.36 Chrome Mobile 89 Android 6A4001 Plus
Mozilla/5.0 (Linux; Android 6.0; Fero A4001 Plus Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.75 Mobile Safari/537.36 Chrome Mobile 73 Android 6A4001 Plus
Mozilla/5.0 (Linux; Android 6.0; Fero A4001 Plus Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.91 Mobile Safari/537.36 Chrome Mobile 55 Android 6A4001 Plus
Mozilla/5.0 (Linux; Android 6.0; Fero A4001 Plus Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/139.0.7258.154 Mobile Safari/537.36 EdgA/139.0.3405.125 Microsoft Edge 139 Android 6A4001 Plus