1.The official firmware 1.3.0 Build 20230322 is the prerequisite firmware before upgrading to 1.4.0 Build 20231114. 2. For ER7206 (TL-ER7206) v1.0 and v1.6. 3.If you have disabled the HTTPS port, please enable the HTTPS port before upgrading the firmware. Or you will NOT be able to ...