Q6：WIFI could not search out a wireless router.
Possible Reasons：
Wireless Router uses 801.11N 5Gbit standard.
Solution：
WIFI device does not support the 801.11N 5Gbit standard, please use
the router supporting 801.11A/G/B/N standard (N only supports
2.5Gbit).
Q7：WIFI signal is not stable.
Possible Reasons：
WIFI is too far away from the wireless router or blocked.
Solution：
No shelter between wireless router and WIFI. In the unobstructed case,
WIFI effective distance is 20 m.
Q8：WIFI signal is a full grid; But still not able to connect to the network.
Possible Reasons：
The wireless router is wrongly connected to your modem.
Your modem crashed.
Solution：
