The list of available packages is in RAM, so you have to run opkg update to download a new list after any reboot. Then you can use opkg install.
The other reason might be that you are using a version from before MT7601 support was added.
The list of available packages is in RAM, so you have to run opkg update to download a new list after any reboot. Then you can use opkg install.
The other reason might be that you are using a version from before MT7601 support was added.