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Business Name: NSYS Group Website: https://nsysgroup.com Industry: Software Solutions for Used Mobile Device Businesses Business Type: B2B Software Provider Headquarters: Lithuania (EU) Service Area: Global Buying or reselling a used mobile device can be risky without proper testing. Whether you're a retailer, refurbisher, or wholesaler, knowing how to test used smartphones for errors ensures you're selling safe, functional, and high-quality devices. In this guide, we’ll walk you through the essential steps to test used mobile devices for software and hardware issues—manually or with professional diagnostic tools. 🔍 Why Testing Is Important Used devices may look fine on the surface, but hidden issues like battery degradation, touchscreen malfunctions, or blacklisted IMEIs can cause returns, negative reviews, or legal issues. Proper testing helps you: Detect hardware/software faults Ensure device performance Prevent fraud and return rates Improve customer trust and satisfaction 🧪 Step-by-Step: How to Test a Used Mobile Phone 1. Physical Inspection Start with a visual and tactile inspection: Check the screen for cracks, dead pixels, or discoloration. Test all buttons (power, volume, home, mute switch). Inspect the casing for dents, scratches, and water damage indicators. Check ports (charging, audio jack, SIM tray) for dust, rust, or obstruction. 2. Functional Hardware Testing Manually test key hardware components: Display: Touch responsiveness, multi-touch, brightness, dead zones Camera: Focus, video recording, flash, and switching between front/back Microphone & Speaker: Make a voice memo or call Vibration Motor: Toggle vibration mode Sensors: Check accelerometer, proximity, gyroscope (using apps or built-in settings) Battery Health: Use diagnostics code or third-party apps 3. Software & OS Check Ensure the device boots up properly Check the OS version and updates Test Wi-Fi, Bluetooth, GPS, and mobile network connectivity Reset the device and verify it restarts without errors 4. IMEI & Blacklist Verification Use the device’s IMEI to: Check for carrier lock Verify blacklist status (lost, stolen, or blocked) Confirm manufacturer and warranty info You can check this on global IMEI databases or use diagnostic software like NSYS Webchecker for bulk verification. 5. Data Wipe Verification Ensure the device is free of previous owner data and Apple/Google accounts: Remove Apple ID (check iCloud status) Disable Find My iPhone / Google FRP Perform a full factory reset Run a certified data erasure process for compliance (especially for resale) 6. Use Automated Testing Software (Optional but Recommended) Manual testing can be time-consuming and error-prone. For bulk testing or professional environments, consider using automated diagnostic software like NSYS Diagnostics: Run 60+ automated tests (battery, sensors, audio, etc.) Works with Android and iOS Robotic support for high-volume testing Generates reports and grading certificates ✅ Final Checklist Before you approve a used phone for sale, make sure: All hardware components are tested IMEI is clean and verified Software is up to date and functional Data is securely erased The device is graded accurately (A/B/C)

I've uploaded an updated build of LineageOS 16.0 for good-old qx1000 (SD835 Pro1) to: https://findus.zwergenschaenke.net/~puma/linux.html#lineagepro1 The ROM dated '20250528' contains backported ASB fixes up to patchlevel "1 May 2025". No other changes since last post. Have fun.

Lineage-22.2-20250526-NIGHTLY-pro1x with May 5th security patch installed smoothly via OTA. MindTheGapps15, and root was maintained.

Well we could live with that... I got a bit better, but mine is currently a REALLY minimalistic setup, and was with zero screen interaction, so that was to be expected. But in the order of 1% / hour would be what I'm used to see WITH the sim mounted and online on e.g. 22.1.

7-8% in 7 hours with flightmode on and mounted SIM.