Samsung Galaxy S21 is expected to release on Jan 14. Samsung is expected to release S21, S21 Plus, and S21ultra variant with new edition galaxy buds.
The S21 and S21 plus will be capable of a 120Hz display but will have FHD resolution. The S21 ultra will have 120Hz which uses an LTPO display which allows phones to vary their refresh rate more easily.

In the above picture S21 and S21plus will have 12MP main camera, 12MP ultra wide and 64MP telephoto camera and flash.

In the above picture for S21 ultra will have 108MP as the main camera, while telephoto has 2 10MP camera sensors and flash time of flight sensors.
Here all specs for Galaxy S lineup
| Specifications | S21 | S21Plus | S21Ultra |
| Display | 6.2 Inch FHD+ 120Hz LTPS | 6.7 Inch FHD+ 120Hz LTPS | 6.8 Inch 120Hz WQHD+ |
| CPU | Snapdragon 888 OR Exynos 2100 | Snapdragon 888 OR Exynos 2100 | Snapdragon 888 OR Exynos 2100 |
| RAM | 8GB | 8GB | 12GB |
| Storage | 128GB, 256GB | 128GB, 256GB | 128GB, 256GB, 512GB |
| Rear Camera | Ultrawide 12MP Main 12MP Telephoto 64MP | Ultrawide 12MP Main 12MP Telephoto 64MP | Ultrawide 12MP Main 108MP Telephoto 10MP &10MP |
| Connectivity | 5G, WIFI 6, Bluetooth 5.1 | 5G, WIFI 6, Bluetooth 5.1 | 5G, WIFI 6E, Bluetooth 5.1 |
| Colors | Phantom Violet, Phantom pink, Phantom Gray, Phantom white | Phantom silver, Phantom black, Phantom violet | Phantom Black, Phantom Silver |
| Battery | 4000mAh | 4800mAh | 5000mAh |
| S Pen support | NO | NO | NO |
| Size | 6 inches | 6.4 inches | 6.5 inches |
| Weight | 170 grams | 194 grams | 226 grams |
| Software | One UI 3.1 Android 11 | One UI 3.1 Android 11 | One UI 3.1 Android 11 |
Galaxy S lineup is expected to have a cool feature like director mode where you can see from different camera lenses at once this feature will allow you to capture videos through different images. Samsung will not include a changer in the box. It is set to release its products on Jan 14.