Just checked my Verizon 4G LTE MiFi and the headers are not there, I've not done anything special to my account settings.
On ATT I see the X-Acr thing but not clear if it's UID like or not in nature, would need to see more of them.
On ATT I see the X-Acr thing but not clear if it's UID like or not in nature, would need to see more of them.