Yeacomm 4G LTE router with T-Mobile unlimited SIM. I found this is not compatible to configure OVPN static IP. Though the iPv4 says connected and when I connect the WAN port to
Model 7004 Cellular Secure Network Gateway AT&T, T-Mobile, & Verizon Certified with LTE Internet, VPN, & Integrated WAN Failover - IP Technology Labs
Support - ConnectCSG
How to Set Up a Static IP Address | PCMag
LTE Network Extender User Guide
4G LTE Service (Verizon) Static IP - Protectli
how to set up static IP on Verizon's fios wifi router G1100 - YouTube