can i upgrade/pay for iCloud memory on my own devices if i'm 3rd party to a shared phone plan?
can i upgrade/pay for iCloud memory on my own devices if i'm 3rd party to a shared phone plan?
iPhone 6s, iOS 9.3.4, AT&T carrier
Upgrading one's iCloud storage shouldn't have anything to do with the device's phone plan.
Here -- iCloud storage upgrades and downgrades - Apple Support & iCloud storage plans and pricing - Apple Support