Huawei Mate 20 Pro (LYA-L29) Stock Firmware update updates system security with Android protection patches. Integrates Android security patches released in December 2019 for improved system security. You can visit the official Huawei website: https://consumer.huawei.com/en/support/bulletin/2019/12/, For more information on the security of Huawei EMUI system updates.
Huawei Mate 20 Pro (LYA-L29) Stock Firmware update will not delete your own data. Before updating, we recommend that you back up any important data. If you find any problems during the update, don’t hesitate to call the Huawei customer service hotline or visit a Huawei customer service center for help.