Important Note:

If the ZLINK app of your Android unit can not be re-activated after system updated or factory data reset. Please download this new apk and install it in the unit.

Download link:

ZLINK(version_3.5.59):

https://drive.google.com/file/d/1_xg3gD1k6nXI-Zewcb9Nw6L-L61uP3ET/view?usp=sharing