This teardown video of the Samsung Galaxy S21 5G shows that the interior is quite similar to that of the Galaxy S20 before it. To get inside, the plastic back must be removed first. And yes, it’s very much a plastic material - not even a hint of glass here. Inside the Samsung Galaxy S21 5G and S20 5G This S21 unit is equipped with two mmWave 5G (other versions only support sub-6). The antennas are located one each on the left and right sides. They are not huge, but that’s still two more antennas than a 4G phone needs to house. Last year Samsung built a special mmWave-enabled...
Source: https://www.gsmarena.com/disassembly_video_shows_the_galaxy_s21_internals_havent_changed_much_since_the_s20-news-47264.php
