Sailing Basta

Hi, I'm just trying to find some info in regard to T-Mobile service when using your device as a Hotspot. I get fast speedtests (upwards of 40mbps) but it seems like tethering may be capped at 0.5mpbs Is there any way I can work around this issue. It appears that bandwidth testing services such as Ookla Speedtest, or TMN are on some sort of whitelist but everything else is capped. I'm using an unlocked OnePlus 2 running Android 6.0.1 and also trying to make my router work with the same sim card, a Huawei b593u-501. Same issue with the router, fast speedtests, but slow download using uTorrent or anything else on the web.