The new OTA update for Galaxy A71 is bundled with the firmware version A715FXXS7BUJ1. It is reportedly rolling out in various markets, including Austria, Croatia, Hungary, Poland, the Czech Republic, Macedonia, Slovakia, Greece, France, Slovakia, Portugal, Germany, the Netherlands, Italy, and the UK. It’s just a minor security patch and is unlikely to bring any major changes. Samsung Galaxy A7 (2018), on the other hand, is also receiving the October 2021 security update. It is reportedly rolling out in Brazil with the firmware version A750GUBS6CUJ2. Currently, we don’t have the complete changelog. However, it might include device stability improvements and several bug fixing.
The October 2021 security patch for Samsung phones fixes over 60 system security and privacy-related vulnerabilities. Therefore, we recommend you to install the update, as soon as it pops up on your phone. Samsung Galaxy A7 (2018) and Galaxy A71 users in the specified regions have started picking up the October 2021 security update. Those who are still in the queue can manually check for the new update by navigating to Settings » Software updates. [via 1, 2]