SAMSUNG GALAXY S21 SERIES: 

The Samsung Galaxy S21 series, launched in January 2021, comprises three main models: the Galaxy S21, Galaxy S21+, and Galaxy S21 Ultra. Here's an overview of each model:

1. Samsung Galaxy S21: The base model in the series, the Galaxy S21 features a 6.2-inch Dynamic AMOLED display with a Full HD+ resolution and a 120Hz refresh rate. It is powered by either a Qualcomm Snapdragon 888 or Samsung Exynos 2100 processor (depending on the region). The phone typically comes with options for 8GB of RAM and storage options ranging from 128GB to 256GB. It features a triple-camera setup on the rear, consisting of a 12MP wide, 12MP ultra-wide, and 64MP telephoto lens. The front camera is a 10MP shooter.

   
   
   

2. Samsung Galaxy S21+: The Galaxy S21+ is the mid-tier model with a larger 6.7-inch Dynamic AMOLED display, also featuring Full HD+ resolution and a 120Hz refresh rate. It shares similar specifications to the Galaxy S21, including the same processor options, RAM, and storage configurations. The camera setup is also identical, with a triple-camera array on the back and a 10MP front camera.

   
   
   

3. Samsung Galaxy S21 Ultra: Positioned as the premium flagship in the series, the Galaxy S21 Ultra boasts a larger 6.8-inch Dynamic AMOLED display with a Quad HD+ resolution and an adaptive 120Hz refresh rate. It is powered by either the Qualcomm Snapdragon 888 or Samsung exynos 2100 processor. The S21 Ultra offers configurations with up to 16GB of RAM and storage options ranging from 128GB to 512GB. The standout feature of the S21 Ultra is its advanced quad-camera setup on the rear, which includes a 108MP wide, 12MP ultra-wide, and two 10MP telephoto lenses (one with 3x optical zoom and the other with 10x optical zoom). The front camera is a 40MP shooter.

   
   
   

All models in the Galaxy S21 series support 5G connectivity, feature IP68 water and dust resistance, and run on Samsung's One UI software based on Android. They also lack a microSD card slot for expandable storage, a departure from previous Galaxy S series devices.