Wireless Joint

I saw the Maswell 5G mmWave antenna is for sale at a couple online shops and am wondering if anyone has tried it?

I tried it and the IMEI did change however the modem still won't connect. I replaced the modem with a different working module for the time being.

I think I remember modem manager saying it was in "factory-test" mode. Is there such a mode and how can I avoid it?

I used QFirehose to update the firmware on a RM502Q-AE from RM502QAEAAR11A04M4G_01.002.01.002 to RM502QAEAAR11A04M4G_01.004.01.004. After that it would no longer connect and I noticed it no longer has the same IMEI that's printed on the card. How do I restore the original IMEI?