My iPad doesn’t show LTE

Please I have been trying for days to figure this out. I just got the latest iPad Pro the 64gb LTE version and I put SIM card in it for me to use cellular data but it’s always on 3G and not. I have gone to sting and enabled LTE but that doesn’t work, I kept enabling and re-enabling but to no avail. I have followed the apple guide but that doesn’t work either. And it’s not a question of whether the SIM card is LTE enabled as I have put the exact same sim in my iPhone and the LTE shows instantly. I have restored the device multiple time but to no avail, please help me on what to do, thanks.