Hi irvine2022,
Welcome to the Apple Community.
(We are all Apple-users, like yourself, and are volunteering.to help troubleshoot.)
Your Apple ID is the account you use to access Apple services,
like the App Store, Apple Music, iCloud, iMessage, FaceTime, and more.
It includes the email address and password you use to sign in as well as the contact, payment, and security details you use across Apple services.
If you do not already have an Apple ID account::
How to create a new Apple ID – Apple Support
____________________________________________________________________
✽ Re: invalid postcode
Seems the postcode must match the country of the App Store you use,
and
the postcode needs to match the one used with credit / debit card personal info.
If necessary: You can try entering a zero, 0 in the postcode section.
______________________________________________________________
✽ Re: my Malawian phone number is also invalid
You may need to add the country code / area code before / as part of / your phone number.
You might try entering only numbers (no spaces).
____________________________________________________
✽. Re: in your country or region:
Payment methods that you can use with your Apple ID – Apple Support
says:
Malawi
Most credit and debit cards
___________________________________________________
✽ Re: "This Apple ID Has Not Yet Been Used in The iTunes Store".
Seems this message appears if you do not have a payment method in your Apple ID account. Apple requires this, for the first time you use the App Store or iTunes Store.
This applies even if you are downloading only free apps.
How to: Change, add, or remove Apple ID payment methods - Apple Support
Then use your Apple ID to Log-in to the App Store.
Download apps and games on your iPhone or iPad - Apple Support
_____________________________________________________________
For more info:
Find answers to your questions about purchases, subscriptions, payments, and billing:
(NB: You can also use the "Get Support" link at the bottom of the webpage to contact staff.)
Subscriptions and Billing - Official Apple Support
Apple ID Support Page:
Apple ID — Official Apple Support
App Store Support Page
App Store - Official Apple Support
All the best :-)
