After the Galaxy S21 and S21 Ultra teardown videos, the third phone of the family received the same treatment – here is the Galaxy S21+ disassembled. In the process of taking the phone apart, YouTuber PBKreivews discovered the distinction between single and dual-SIM models.
It’s mostly in the software – all S21 models have two SIM readers, but in single-SIM versions one of them is disabled. It may be possible to flash a different firmware to enable the second reader. You’ll also need a new SIM tray, one that can hold two SIMs.
