The iPhone 15 series is expected to launch on September 12, but the best time to sell your current iPhone is a lot earlier than that. According to historical trade-in data, you should aim to sell or get quotes for your old iPhone sometime between August 19 and August 26, in order to get the best price for it.The smartphone trade-in price comparison site SellCell says that week is the sweet spot for keeping your current iPhone for as long as possible, while avoiding the sharp decline in value that historically takes place in the few weeks before a big Apple iPhone event. …
