Second hand mobile phones: under ₹20,000

Samsung Galaxy Z Flip4 128GB OS: Android 16.0; Display: 6.70" (1080x2640 px, AMOLED); Camera: 12 MP; RAM: 8 GB; Storage: 128 GB; Battery: 3700 mAh ₹20,000 Realme GT 2 Pro 256GB OS: Android 14.0; Display: 6.70" (1440x3216 px, AMOLED); Camera: 50 MP; RAM: 12 GB; Storage: 256 GB; Battery: 5000 mAh ₹20,000 Samsung Galaxy Z Fold2 5G cosmos black OS: Android 13.0; Display: 7.60" (1768x2208 px, AMOLED); Camera: 12 MP; RAM: 12 GB; Storage: 256 GB; Battery: 4500 mAh ₹20,000