Hi, friend!
B535-932 is a consumer device.
According to your problem description, I cannot locate the fault accurately.
The device supports SIM cards and broadband access. You need to indicate which method cannot access the network.
In addition, if you use a SIM card to access the network, place the SIM card on your phone and check whether the network is available in the same area.
If you can, please provide the device version information.
Thanks!