For trade-in,please visit https://www.ksmobile.com.sg/trade-in/to check our updated trade-in prices. Warranty - 6 Months Oppo Singapore WarrantyWireless Charging 45W Max (30W Max for Find X3 Pro)Wireless charging works upright and landscapeAutomatic switch to silent mode at night (noise will be reduced with maximum wireless power of 12 watts)Wireless charging possible through a plastic phone case up to 2 mm