Question about vat refund and international warrenty

I know very little as to how that affects the VAT refund and will defer to other community members. In regard to warranty coverage, you have a warranty in the country or region of intended purchase. Warranty service in other countries or regions may be limited.

The return of a product is limited by the merchant’s return policy. If the merchant does not accept the return, your device is subject to Apples warranty.

What is the model number for your iPhone? For example, here’s the model numbers and intended markets.

Model Number: A3081 (United States, Puerto Rico), A3286, (Bahrain, Canada, Iraq, Guam, Japan, Jordan, Kuwait, Mexico, Oman, Qatar, Saudi Arabia, United Arab Emirates, U.S. Virgin Islands), A3288 (China mainland, Hong Kong, Macao), A3287 (other countries and regions)

IMPORTANT RESTRICTION FOR iPHONE, iPAD, APPLE TV, AND HOMEPOD SERVICE.

Apple may restrict warranty service for iPhone, iPad, Apple TV, and HomePod to the country where Apple or its Authorized Distributors originally sold the device.

Orders placed in the UK will be subject to a VAT rate of 20 per cent. VAT refunds on exports. Apple are not permitted to refund any VAT charged on UK purchases ...

Payment, Financing, Refunds and VAT - Shopping Help

The warranty reads, may restrict. Some repairs may be available and some may not. You may be limited to having warranty service only at Apple Retail Store. Major repairs may be limited to returning your iPhone to Vietnam for repair. That can mean being without your iPhone for weeks.

Re: “So if I want to use the warrenty it can only be in vietnam?”

Yes, that is quite possible. Apple wants you to buy an iPhone in your own home country.