Cannont obtain an IP address with USB tethering

[blueveryday]

via DHCP, the interfave couldn't obtain a IP address.
I use "lsusb", I see a list for usb devices, include android cell phone usb interface.
about rdnis, the log display: rdnis_host infomation is right.
I just use openwrt 23.5.5.

[blueveryday]

Yes, I understood what you said.
Unfortunatly, rdnis_host display to work well, interface use the usb0 device, No IP, openwrt cloudn't obtain IP adress from android cellphone.
I have no idea.

[psherman]

Does your phone and your carrier + plan support tethering? Are you able to use USB tethering with your computer?

Let's take a look at your configuration:

Please connect to your OpenWrt device using ssh and copy the output of the following commands and post it here using the "Preformatted text </> " button:

Remember to redact passwords, MAC addresses and any public IP addresses you may have:

ubus call system board
cat /etc/config/network
cat /etc/config/wireless
cat /etc/config/dhcp
cat /etc/config/firewall

[blueveryday]

Dear Sir,
The cellphone's usb tethering work very well with my computer.

I have to creat a new wan interface by usb0, and then the new interface work very well.
it's amazing！
If I modified the existing interface of wan, the interface doesn't work.
Thank you very much!
sovled.