Installing the wrong firmware can "brick" the unit. Only update if you are experiencing bugs or connectivity issues. Junsun 8227L Android CarNavi firmware update
When searching for , the term "TOP" refers to a specific build variant. These units have two common firmware branches: android auto firmware latest update 8227l top
There is no official OTA for generic 8227L units. Most updates come from XDA Developers forums, 4PDA (Russian), or seller support. Here are safe sources: Installing the wrong firmware can "brick" the unit
: Plug the USB into the head unit while it is powered off, then turn the ignition on. then turn the ignition on.