[header] How to make your old iphone useful [title] When you go for your upgrade, make it clear to the salesperson in the store that you want to keep your old phone. [step] Some stores may pressure you to trade it in or recycle it. But your old iphone is worth a lot more than you can be offered. 
[title] Go to settings, general, and about, and change name from your current to something else, such as your name followed by " old. [step] " this way, under icloud, you will have a way to distinguish the devices.