I have a GL-X750 split router with a T-mobile hotspot SIM. The unit worked fine for about 2 weeks with no issues. When I put the sim in that I ordered from T-mobile it Started working right away. After about 2 weeks the internet connection was lost. When I log into the GUI of the router it tells me the sim is not registered. It is a brand new sim and still has plenty of data left on the account.
I have tried to AT command AT+QPRTPARA=3 with no luck. I updated the firmware in the modem to the newest firmware from the GL website. Manually changed bands between 12 and 66 as those are the bands on my nearest tower. Verified the APN was correct fast.T-mobile.com When I run the AT command to check signal it says ok. I also have a directional exterior antenna to boost signal strength which was working great before the sim showed unregistered. I disconnected the exterior antenna and put the OEM ones back on.
I have T-mobile as our cell phone carrier as well and have good signal with good speedtest in our house off our phones. I have called T-mobile several times and they assure me that the sim card is activated and everything is good on their end (If this is true I don’t know).
Any help will be appreciated. I looked at the other posts on this subject and all seem to be over a year old with no actual solution. Thanks in advance.