If you are a new subscriber, tap , scroll down, and select Upgrade to iCloud+ .
To buy more storage for your iPhone, you can upgrade to an subscription directly through your device's settings . It is important to note that you cannot increase your iPhone's internal physical storage after purchase; buying iCloud storage only increases your "cloud" space for syncing photos, backups, and files. Steps to Upgrade Storage how to buy more storage on iphone
The process varies slightly depending on your current iOS version: : Open the Settings app and tap your name at the top. If you are a new subscriber, tap ,