Instagram and Facebook issue on T-Mobile LTE network

Vaz wrote:

Videos buffering on my Instagram and Facebook when I'm on LTE network, despite the fact my internet speed test speed shows more than 90 megabits per second. When I turn my VPN on, it fixes the issue. Not sure what's going on. Is T-Mobile restricting the connections for Instagram and Facebook? YouTube videos work simply fine, even with the highest quality. Home Wi-Fi internet speed test shows 30 megabits per second and never have any issues with IG and FB when I'm connected to the Wi-Fi. 

Hi im having the same problem, I cant use facebook or Instagram because it doesnt load at all, some people says that it might be the sim card that is broken and thats why. I can use it only with WIFI  but with cellular data.