OPPO K7x, Used – 128GB/6GB RAM – 5G, 6.5″ 90Hz LCD Display

Design & Build

• 6.5-inch LCD display with 2400 x 1080 resolution, 90Hz refresh rate, and up to 180Hz touch sampling – hole-punch design with 90.5% screen-to-body ratio 
• Mediatek Dimensity 720 octa-core processor (7nm) – 2×2.0GHz Cortex-A76 & 6×2.0GHz Cortex-A55, Mali-G57 MC3 GPU – 5G-integrated mid-range chipset with SA/NSA dual-mode support 
• 6GB LPDDR4x RAM with 128GB UFS 2.1 storage – also available in 8GB/128GB and 8GB/256GB variants – no microSD card slot 
• Quad 48MP rear camera: 48MP main (f/1.7, PDAF) + 8MP ultra-wide (119° FoV) + 2MP macro + 2MP portrait – 4K@30fps, 1080P@120fps slow-mo, EIS video stabilization 
• 16MP front camera (f/2.0) – 1080P@30fps video, AI beautification 
• 5000mAh battery – 30W VOOC 4.0 fast charging (100% in ~66 min) – one of the largest batteries in its class 
• Side-mounted fingerprint sensor (power button), Face Unlock, 3.5mm headphone jack, USB Type-C, Bluetooth 5.0, no NFC
• 5G connectivity – Dual SIM (Nano-SIM + Nano-SIM) – 5G bands n1/n41/n77/n78 
• ColorOS 7.2 based on Android 10 – upgradable to ColorOS 11; limited future updates
• 3D curved plastic back with aluminum frame – 162.2 x 75.1 x 9.1mm, 194g – available in Black Mirror and Blue Shadow 
• 30W VOOC charger and USB-C cable included in box

Key Highlights & Considerations:

• Excellent battery life – 5000mAh provides up to 16.1 hours of video streaming, 8.4 hours of gaming; 30W fast charging fully charges in ~66 minutes 
• 90Hz display – Smooth 90Hz refresh rate with 180Hz touch sampling for fluid scrolling and responsive touch; LCD panel with 480 nit typical brightness 
• 5G connectivity at budget price – MediaTek Dimensity 720 with 5G SA/NSA support, one of the more affordable 5G options when launched 
• Versatile camera system – 48MP main with 4K video; 119° ultra-wide lens for landscapes; 16MP front camera 
• Side-mounted fingerprint sensor – Fast and convenient unlock integrated into the power button 
• No microSD card slot – Storage is non-expandable; choose capacity carefully
• No NFC – Contactless payments not supported
• Older software – Launched with Android 10; limited future OS updates
• Released November 2020 – by 2026 standards, aging chipset; best suited as a secondary device or for users prioritizing battery life over performance