Start with the manufacturer’s checklist
Apple’s “What to do before you sell, give away, or trade in your iPhone or iPad” guide covers transfer or backup and removal of personal information. Follow the instructions that apply to the specific device you own.
Keep device preparation separate from your request
The New York Buyback form records the brand, model, condition, quantity, ZIP code, and a contact method. You can gather those details before or after reviewing the manufacturer’s preparation guide.
Add a clear model description
Use the phone’s model name or model number in the form. Apple explains how to identify an iPhone model; Samsung’s mobile support page offers searches by model code or product name and a model-number lookup link.