Inspect the active network
Android may auto-join nearby saved Wi-Fi. Entering an office or hotel can change the underlying connection. Check active network name and authentication before diagnosing the VPN. A signal icon does not establish usable Internet access.
Manage unwanted saved networks
Review saved networks and forget an obsolete hotspot after verifying its name. Keep rejoin details first and consult administrators for work networks. Do not join an unfamiliar hotspot merely because its name looks similar.
Record the transition before reconnecting
Save work, keep one verified network and reconnect through Yunbao. Record network, time, error and venue type without a precise address. Network reset can interrupt calls, so avoid it during a call.