Choose a new storage plan and follow the instructions to buy. iPhone Device Storage vs iCloud Storage
If you have a plan and want to increase it: Tap Subscriptions > iCloud+ (under Active) > See All Plans . how do you buy more storage on iphone
Select your desired storage tier and follow the on-screen prompts to confirm the monthly billing. Go to Settings > [Your Name] > iCloud . Scroll down and tap Manage Plan . Choose a new storage plan and follow the instructions to buy
If you do have a current subscription: Tap iCloud > Upgrade to iCloud+ . Go to Settings > [Your Name] > iCloud
The process varies slightly depending on your version of iOS. Open the Settings app and tap [Your Name] at the top.
To buy more storage for your iPhone, you must upgrade to an subscription , as the physical internal storage of your device is fixed and cannot be changed after purchase. Step-by-Step Instructions to Upgrade