Does RM530N-GL work with T-Mobile in the USA?

I have had this RM530N-GL modem for more than a month, and spent more hours trying to get it to connect to my T-Mobile provider (with my T-Mobile SIM card) than I care to count.

Same SIM works fine with a Sierra Wireless modem, but no matter what I do, I cannot connect to T-Mobile. The most meaningful of errors is “CME Error 30,” which means No Network Service, and I don’t know what that means.

But it sort of connects to an AT&T cell in roaming mode, but it is always just “searching” when I force it to T-Mobile.

So it has finally occurred to me to ask if ANYONE in the USA has actually gotten an RM530N-GL with a T-Mobile SIM card to connect to T-Mobile? Anyone? It is starting to seem like T-Mobile is just blocking or banning Quectel RM530N-GL, which, if that is true, should become public knowledge. I’m not saying that is what is happening, I just don’t know. Tech support here is trying to help, but no progress so far. Appreciate any feedback.

Thanks…

Dear @jzb
Please check mbn file and APN on your side.
At+QMBNCFG=“list”
AT+QICSGP?
AT+CGDCONT?