How to enable LTE on RAK-5146 with Raspberry

[jalallinux]

Hello
I want to enable LTE on rak-5146.
My steps:

1. Run this command on raspberry sudo gateway-config
2. Configure APN name
3. Set APN name: mcinet for MCI
4. Set Baud Speed to default value: 115200
5. Configure LTE Module
6. Enable LTE Automatic Dial-up
7. Run sudo reboot

But after rebooting i don't have ping of 8.8.8.8 without Ethernet cable.