Yes here the qoute from openwrt
Wireless Country Code Issue
The Country Code under Wireless in OpenWrt does not work, and you do need to set/change the country code in the latest Raspbian, and then you can go back to OpenWrt; the new country code will be used. Starting with Raspberry Pi 3 B+, the on-board wireless won't even start if there is no country code (set in Raspbian) See: Cannot use channels 12 and 13 on Raspberry Pi 3 in AP config - #3 by 127.0.0.1
You're wlan0 didnt got an ip.
Some mobilephone contracts are restricted so it wouldn't be possible to use your phone as hotspot. Did you tried it before?