Need MR1100 Nighhawk Mobile Hotspot APN Settings for ATT

In working with ATT on another issue they had me change all the APN settings in my MR1100.  Unfortunately no one at ATT seems to know what these settings need to be.  I need the correct ATT settings for:

APN Name:

APN:

Authentication:

PDP Type:

PDP Roaming:

Right now I have these set to the following:

APN Name:  ATT

APN:  Broadband

Authentication:  None

PDP Type:  IPv4

PDP Roaming:  IPv4

It will connect and work with ATT, but it is very slow (2Mbps on average in a speedtest).  I found the APN settings I entered on the web and was not very confident they were really optomized so wanted to see what others were using.  Thanks.