1. Go to the Apple website at apple.com. 2. Hover over "iPhone" in the top menu bar, then click on "iPhone 15 " 3. Scroll down and choose your preferred model, color, and storage capacity. 4. If you have an iPhone you want to trade in, choose " select Smartphone " . If not, choose "No trade - in". If you chose to trade in your old iPhone, select its model, indicate whether it's in good condition, and answer any follow - up questions about its condition 5. Then choose your preferred payment method and whether you want AppleCare coverage. 6. Finally, scroll down a bit and click on "Add to Bag". Yay!! You did it!