I can’t put my card to purchase some apps on the App Store

I already have teh card on my wallet

That mean you can use Apple Pay.

Apple Pay is the way to pay. It replaces your physical cards and cash with a method of payment that is private, easier and safer. Whether you pay in a store, on a website or in an app. This is the new payment.

it is actually the same as paying contactless with your bank card, only via the iPhone.

See ⤵️

Use Apple Pay for contactless payments on iPhone

Use Apple Pay for contactless payments on iPhone – Apple Support (UK)

Learn where to use Apple Pay

Learn where to use Apple Pay - Apple Support

Make purchases using Apple Pay

Make purchases using Apple Pay - Apple Support

Make contactless payments using Apple Pay on iPhone

Use Apple Pay for contactless payments on iPhone – Apple Support (UK)

Use Apple Pay in apps, App Clips, and Safari on iPhone

Use Apple Pay in apps, App Clips, and Safari on iPhone – Apple Support (UK)

to purchase some apps on the App Store

You need to update your payment information, see:

If you can't make purchases or update apps, including free apps, you need to update your payment method or add a new one. 

See the following Apple articles:

Payment methods you can use with your Apple ID

Payment methods you can use with your Apple ID – Apple Support (UK)

Add money to your Apple ID balance

Add money to your Apple Account balance – Apple Support (UK)

If you update your payment method or add funds to your Apple ID balance, It would take about 1 to 3 business days in order to process.

If you're still unable to update your payment method, Contact Apple Support.

Additional check: 

See this Apple article: If you see No Service or Searching on your iPhone or iPad

If you see No Service or Searching on your iPhone or iPad - Apple Support

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