My Firebrick says that I have an MTU of only 1440 over AA 3G when using an AA-supplied Huawei dongle. Tests using IPv4 seem to confirm this. I think AA’s website says the MTU is 1500 for AA mobile data SIMs?
Also, one of my iPads has an AA 4G SIM fitted and IPv4 ping tests seem to indicate an MTU of 1450.
Is anyone else seeing this?
Reduced MTU is a pain. I am talking to AA support about this, but have not had a useful reply yet, could be they are still looking into it