OS	Android 6.0 (Marshmallow), upgradable to Android 7.0 (Nougat), Walton OS with extreme power saver & reverse charging OTG power bank suite
Chipset	MediaTek Helio P10 MT6755 (28 nm 64-bit 2.0GHz Octa-Core Cortex-A53: 4x 2.0GHz + 4x 1.1GHz & ARM Mali-T860 MP2 GPU @ 700MHz with 1080p Hardware Video Decoder + NXP SmartPA Hi-Fi Amp)
RAM	4GB High-Speed Dual-Channel LPDDR3 RAM (4GB RAM Flagship!)
Storage	64GB Massive High-Speed eMMC 5.1 Internal Storage (54.0GB User Accessible)
Display	5.5 inches • 1080 x 1920 pixels (16:9, 401 ppi Full HD Super AMOLED!)
Main camera	16.0 MP Main (f/2.0 aperture, 6P Lens, Phase Detection Autofocus PDAF 0.1s, Dual-LED flash, HDR, Panorama, 1080p@30fps video)
Selfie camera	13.0 MP Wide (Front LED Selfie Flash!, 88° Wide-angle lens, Face Beauty, 1080p Full HD video)
Battery	5000 mAh Monster Colossal Battery (19.0 Wh) (Powers over 30 hours calling / 750 hours standby / 4 days heavy use!), 9V/2A Rapid Fast Charging via Modern Reversible USB Type-C & USB OTG Reverse Power Bank Function • Non-removable Li-Po 5000 mAh
Weight	183 g (6.46 oz)

Latest Walton Primo X4 Pro user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; Android 6.0; Primo X4 Pro Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/62.0.3202.84 Mobile Safari/537.36	Chrome Webview 62	Android 6Primo X4 Pro
Mozilla/5.0 (Linux; Android 6.0; Primo X4 Pro Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.98 Mobile Safari/537.36	Chrome Webview 61	Android 6Primo X4 Pro
Mozilla/5.0 (Linux; Android 6.0; Primo X4 Pro Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Mobile Safari/537.36	Chrome Mobile 69	Android 6Primo X4 Pro