vivo S12, Used – 256GB/12GB RAM – 5G, 6.44″ 90Hz AMOLED Display

Design & Build

• 6.44-inch FHD+ AMOLED display with 2400 x 1080 resolution, 90Hz refresh rate, 180Hz touch sampling, 98.5% NTSC color gamut, HDR10+ support, and 3,000,000:1 contrast ratio – TÜV Rheinland low blue light certification 
• MediaTek Dimensity 1100 octa-core processor (6nm) – 4×2.6GHz Cortex-A78 & 4×2.0GHz Cortex-A55, Mali-G77 MC9 GPU – 5G-integrated chipset with 3DMark Wild Life “MAXED OUT!” scores and PCMark Work 3.0 score of 8945 
• 12GB LPDDR4X RAM with 256GB UFS 3.1 storage – also available in 8GB/128GB and 8GB/256GB variants – no microSD expansion 
• Triple 108MP rear camera: 108MP main (f/1.88, 1/1.52″ sensor) + 8MP ultra-wide (120° FoV) + 2MP macro – 20x digital zoom, 4K video recording, Smart-ISO technology, Super HDR 
• Dual front camera: 44MP main (f/2.0, PDAF) + 8MP ultra-wide (105°) – dual front-facing LED fill lights (dual-color temperature, 4 tones) for natural low-light selfies, 4K video recording, Night Selfie, AI beautification 
• 4200mAh battery – 44W FlashCharge – OTG reverse charging – no wireless charging 
• In-display optical fingerprint sensor (0.32s unlock), Face Wake face unlock, NFC support, USB Type-C, Wi-Fi 5 (802.11ac) / Wi-Fi 6 support, Bluetooth 5.2 with aptX HD/LDAC, Hi-Res audio certification 
• OriginOS Ocean based on Android 11 – built-in Atomic Privacy System with face recognition for secure access, memory fusion (+4GB virtual RAM), Multi-Turbo performance optimization 
• AG matte glass back with ultra-slim design – 157.2 x 72.42 x 7.39mm  variant 7.55mm), 179g variant 181g) – available in Warm Gold light-induced color-changing, shifts color under sunlight), Isle Blue, and Obsidian Black
• 3.5mm headphone jack? No – USB-C audio only; wired earphones and Type-C adapter included in box 

Key Highlights & Critical Considerations:

• Light-induced color-changing design  – Unique technology shifts color from blue-purple to orange under sunlight, adding a distinctive dynamic aesthetic 
• 108MP flagship rear camera – Large 1/1.52″ sensor with 9-in-1 pixel binning for improved low-light performance; 120° ultra-wide and macro lens for versatility; 20x digital zoom 
• Industry-leading selfie system with dual LED fill lights – 44MP main with PDAF paired with 8MP ultra-wide for group selfies; unique front-facing dual-color temperature LED fill lights provide natural illumination in low light, supported by screen fill light for best-in-class dark selfies; 4K video recording with beauty effects and background blur 
• OriginOS Ocean with Atomic Privacy System – Built-in privacy system with face recognition for secure app and file storage; memory fusion adds +4GB virtual RAM; Multi-Turbo gaming optimization for smooth performance 
• Good performance for its generation – 3DMark Wild Life scores “MAXED OUT!”, PCMark Work 3.0 score of 8945; handles daily tasks, social media, and casual gaming well 
• Aging chipset by 2026 standards – Dimensity 1100 is a 2021 mid-range flagship chip; handles daily tasks and casual gaming well, but may lag behind newer chips for heavy multitasking and demanding games 
• No microSD expansion – Storage is fixed and non-expandable; choose capacity carefully (128GB or 256GB options)
• Single mono speaker – Uses mono speaker rather than stereo speakers; some users note this as a compromise 
• Mixed battery feedback – Some users report excellent battery life; others note battery drain during standby