I looked through some reviews on Amazon and some of the articles here, but didn't really see a definitive answer on this.
https://www.amazon.com/GL-XE300-Industrial-T-Mobile-Supported-EC25-AFFA/dp/B08PYQL3V2
Is this still locked to T-Mobile Only when flashed with an OpenWRT image (as opposed to the GL.iNet version)? It seems that would indicate that is a function of the modem rather than the router.
I was hoping to find a LTE router to use in Asia that supports OpenWRT and this is the cheapest by far, but useless if locked to T-Mobile regardless of the version of OpenWRT used.