Yes, iPhone 8 does have the noise cancellation.
Yes, iPhone 8 does have Dolby Digital & Noise Cancellation.
Yes, Apple iPhone 8 does have the VoLTE support.
We are extremely sorry to inform you that we do not ship the products outside India. Further, we also suggest you buy it from Singapore only so that you can get the warranty for the product. Only Apple iPhone X comes with the international warranty.
No longer the gold standard, the iPhone 8 is still all the phone you need.