App Store Troubleshooting

Hi mabutho192,

welcome to the Apple (user-to-user) Community.

Wondering if the iOS version on the new second-hand iPhone X has been updated to latest iOS version.(iOS 16.5)

It may be a good idea to update the iOS version, before trying to update apps, so everything stays compatible..

Wondering if the iPhone has been properly prepared for you, as the new owner:

Eg: What to do before you sell, give away, or trade in your iPhone or iPad - Apple Support

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Re: "i.e can’t connect to the internet"

Wondering if the iPhone is connecting to wi-fi ok, or if a SIM card / cellular plan / is supporting cellular data.

Connect to Wi-Fi on your iPhone, iPad, or iPod touch - Apple Support

and

How to: Connect iPhone to the internet - Apple Support

If you wish: How to: Update your iPhone or iPad - Apple Support

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If internet access is still a difficulty:

You may be able to update the iPhone's iOS version to the newest iOS version using a computer that is connected to the internet. NB: iPhone would need to be well-charged.

Eg:

Using a Mac that is running macOS Mojave or earlier.

Update your iPhone, iPad, or iPod touch with iTunes - Apple Support

or

Using a Mac with macOS Catalina or later:

Update your iPhone, iPad, or iPod touch with the Finder - Apple Support

How to: Connect iPhone and your computer with a cable - Apple Support

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When the iPhone's iOS version is recent, and iPhone has internet access, access to the App Store may be ok.

How to: Get apps in the App Store on iPhone - Apple Support

Else:

You may need to first sign in on your updated iPhone, Mac or other device with your Apple ID

Sign in with your Apple ID - Apple Support

( If you do not have an Apple ID Account: How to create a new Apple ID - Apple Support )

It seems Apple requires a valid payment method in your Apple ID account, for the first time you use the App Store, or iTunes, even if you only download free apps. Check which payment methods Apple can accept in your country.

Payment methods that you can use with your Apple ID - Apple Support

How to: Add a payment method to your Apple ID - Apple Support

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Trouble-shooting if needed:

If you can't connect to the App Store, iTunes Store, or other Apple services - Apple Support

If you can't open the App Store or iTunes Store, buy content, or edit payment information - Apple Support

If you can’t download or update apps on your iPhone or iPad - Apple Support

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More Support, if needed:

There are "Get Support: start now" links (online chat, phone, eMail etc.) at the bottom of the websites listed below

iPhone - Official Apple Support

App Store - Official Apple Support

All the best :-)