We chinacardiags.com will test each SD connect C4 unit before shipping to you guys.
Look here: images and videos from Youtube
SD connect C4 firmware: checked, no issues
source: http://www.chinacardiags.com/wholesale/mb-sd-c4-connect-compact-4-star-diagnosis-with-software.html
SD connect C4 LAN & WLAN connection: confirmed without any issue
the unit displays “admin-pc>>csr” in both LAN and WLAN communication
LAN connection: connected via a cable
WLAN connection: connected via WIFI
SD connect C4 working good with Xentry/DAS: confirmed!
BIG THANKS to chinacardiags.com technicians for the tests