Hi, according to your question, for ZB602KL, Android 10 released AOSP version. And the latest version is JP-17.2017.2012.438. If there's any problem while using this version, please manually downgrade to WW-17.2017.2012.438 Thank you.
Thread automatically closed due to inactivity. If the reported issue has not been resolved or you require further assistance from one of our moderators, please create a new thread and we will be with you shortly.