When all the Samsung S21 devices were available for pre-order, the phone had one software problem that would drain its battery when not in use.
The South Korea-based company was swift to push out an update, however, sources claim that this issue is caused by the Wi-Fi connectivity, as when airplane mode was enabled, so it seemed as though the mobile network was the one to blame.
The update number G99XBXXU1AUB6 on February the 14th. The update was around 260MB, it brought device stability improvements, performance boosts and enhanced features.
This wasn't a surprise, as many new phones we have tried in the past always had an issue with firmware/hardware.