1. Comparison of Samsung Galaxy S21 Ultra 5G versions from Hàn, Hồng Kông, and Mỹ:
When distributing the same phone model in different markets, manufacturers typically make specific adjustments to comply with the policies and regulations of those countries. And the Samsung Galaxy S21 Ultra 5G is no exception.
Alongside the officially distributed S21 Ultra in Vietnam, there are also versions such as:
- Samsung Galaxy S21 Ultra 5G Hàn edition
- Samsung Galaxy S21 Ultra 5G Hồng Kông edition
- Samsung Galaxy S21 Ultra 5G Mỹ edition
These versions are products sourced by individuals/companies through parallel imports from countries such as South Korea, Hong Kong, and the USA to Vietnam. Due to Samsung's pricing policies in these countries, the prices of imported versions are often cheaper (when converted to the same currency) even after factoring in shipping costs. This is why many people consider opting for the Hàn, Mỹ, and Hồng Kông editions of the S21 Ultra.
2. Comparing Samsung Galaxy S21 Ultra 5G Hàn, Mỹ, and Hồng Kông editions with the official Vietnam version.
2.1 Differences between Galaxy S21 Ultra versions from Hàn, Mỹ, Hồng Kông, and Vietnam
The only difference between Samsung Galaxy S21 Ultra 5G Hàn edition and the Mỹ, Hồng Kông, and Vietnam editions is the processor chip. Specifically:
- The Galaxy S21 Ultra 5G in South Korea, Hong Kong, and the USA will feature the option of the Snapdragon 888 chip from Qualcomm. Additionally, in the Hàn, Hồng Kông, and Mỹ editions, the Galaxy S21 Ultra 5G will have full RAM/ROM options including: 12GB/128GB, 12GB/256GB, and up to 16GB/512GB.
- Meanwhile, the official Vietnam edition of the Galaxy S21 Ultra, as well as most other regions, will be equipped with the Exynos 2100 chip. This chip is created by Samsung itself, representing the latest and most advanced upgrade of Samsung's chips. For the Vietnam edition, users will only have the option of the Galaxy S21 Ultra 5G with 12GB/128GB or 12GB/256GB of storage.

Based on user reviews, despite having similar performance, the Exynos 2100 chip lacks the same stability as the Snapdragon 888. This is why many prefer imported S21 Ultra models over the official ones.
2.2 Similarities between Samsung Galaxy S21 Ultra 5G editions from Korea, Hong Kong, and the US, and the official Vietnam version
Aside from the differences mentioned in section 2.1, the Galaxy S21 Ultra 5G phones from Korea, Hong Kong, and the US share similar quality in terms of camera clusters, design, and display. Specifically:
– Design
The Samsung Galaxy S21 Ultra 5G phones are quite large with dimensions of 165.1 x 75.6 x 8.9 mm and weigh 228g. They are crafted with premium materials, featuring a metal frame and a back panel covered with Gorilla Glass Victus, designed with a matte finish to create an exquisite appearance while minimizing fingerprint smudges. The device is also IP68 certified for water and dust resistance, capable of being submerged in water up to 1.5m deep for 30 minutes.

– Display
The display of the Galaxy S21 Ultra 5G measures up to 6.8 inches. It features an Infinity-O edge-to-edge screen with slim bezels. The Galaxy S21 Ultra 5G boasts a premium Dynamics AMOLED 2X display panel, with a 120Hz refresh rate, 1500 nits brightness, 515 ppi pixel density, and a resolution of 1440 x 3200 pixels.
Therefore, the Galaxy S21 Ultra 5G delivers a sharp image experience with ultra-high resolution. The ultrasonic fingerprint sensor on the screen is highly responsive and compatible with the SPen stylus.

– Camera Features
The Galaxy S21 Ultra 5G features a 40MP selfie camera located in the center punch-hole on the screen, with an aperture of f/2.2 for excellent selfie shots.
On the rear, the Galaxy S21 Ultra 5G stands out with its quad-camera setup accompanied by an LED Flash and laser autofocus support. The main lens shines with a whopping 108 MP resolution, f/1.8 aperture, delivering high-quality, detailed, vivid, and immersive images. Additionally, there's a 12 MP ultra-wide-angle camera, f/2.2 aperture, and a pair of 10 MP telephoto lenses enabling 3X and 10X zoom, particularly impressive with the 100X Space Zoom feature and effective stabilization.
All lenses on the Galaxy S21 Ultra 5G are capable of recording 4K 60fps videos, with the main camera offering 8K video quality at 24fps.

In addition, all versions of the Samsung Galaxy S21 Ultra 5G come with a robust 5000mAh battery capacity, serving well for work and fulfilling your needs for an entire long day.
3. Should you buy the Galaxy S21 Ultra 5G Korean, Hong Kong, or US version?
Fundamentally, the difference in chips means that both the Korean and US, Hong Kong versions of the Samsung Galaxy S21 Ultra offer good stability during operation, suitable for gaming enthusiasts. Additionally, the prices of these imported/parallel versions are several million dong cheaper than the official ones.
However, due to not being officially distributed, users will not receive Samsung's official warranty in Vietnam. Furthermore, they will miss out on services like Galaxy Gift or other benefits provided with official models. In contrast, with the official Galaxy S21 Ultra, users can enjoy all these perks.
Therefore, users can consider their needs to choose the version that suits them. Moreover, when choosing to buy imported devices, the reputation and warranty policies of the seller are crucial factors to consider. Users should consider reputable sellers that are well-known and trusted by many.
