Postmarketos works well on those and they have lots of info and links. [1]
My biggest tip is to carefully back up every partition of the original firmware - there are many many seemingly identical variants and if you hose your particular baseband components you will lose your cellular functionality.
My biggest tip is to carefully back up every partition of the original firmware - there are many many seemingly identical variants and if you hose your particular baseband components you will lose your cellular functionality.
[1] https://wiki.postmarketos.org/wiki/Zhihe_series_LTE_dongles_...