OS	Android 6.0 (Marshmallow), Clean Pure Stock Android with Zero Bloatware
Chipset	Spreadtrum SC7731 (28 nm 1.3GHz Quad-Core 32-bit Cortex-A7 Processor with Mali-400 MP2 GPU @ 500MHz)
RAM	512MB RAM (Optimized for WhatsApp, calls & SMS!)
Storage	4GB High-Speed Storage
Display	5.0 inches • 480 x 854 pixels (16:9, Compact 5.0" FWVGA 480p 16:9 IPS LCD Display, 196 ppi)
Main camera	Pro Flagship 5.0 MP Rear Camera with LED flash & 720p Video: 5.0 MP (Fixed Focus, HDR, Panorama, 720p@30fps HD video recording) with High-Power LED flash
Selfie camera	Pro Flagship 2.0 MP Front Camera for Video Calling & 480p Video (2.0 MP, 480p video)
Battery	Monumental 2000 mAh Colossal Monster Battery! (Removable Li-Ion, swappable on the go! Powers over 14 hours continuous calling / 320 hours standby / 7 hours continuous video / 40 hours audio!), Micro-USB 2.0 charging in box + Smart Battery Saver • Removable Li-Ion 2000 mAh (swappable on the go!)
Weight	140 g (4.94 oz)

Latest GoMobile Go503 user agents:

User Agent	Browser	Platform
Mozilla/5.0 (Linux; Android 6.0; GO503 Build/MRA58K) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/60.0.3112.116 Mobile Safari/537.36	Chrome Webview 60	Android 6Go503
Mozilla/5.0 (Linux; Android 11.0; GO503 Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/105.0.5195.136 Mobile Safari/537.36	Chrome Webview 105	Android 11Go503