Same case when i plug the sim card into another 4G router as the stock AMINIA router always hangs and disconnects itself.
Now only the sim card works on AMINIA, the other 4G routers just won't work.
It must Maxis detected this and lock the sim card to the stock router.
Based on my understanding, if there's a 4G router where the IMEI /MAC address can be changed, then it would work again.