How to do payments with my iPhone

See the following Apple articles:

Set up Apple Pay

Set up Apple Pay - Apple Support

Countries and regions that support Apple Pay

Countries and regions that support Apple Pay - Apple Support (EG)

Set up Apple Pay in Wallet on iPhone

Set up Apple Pay in Wallet on iPhone – Apple Support (UK)

See this Apple article: 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)