I was able to get my USB 551l modem working w/ my OSX 10.7 Lion, using the admin authentication workaround, using VZ Access Manager 7.3.1. All went weil when I was in a 3G only service area. The WWAN connection established perfectly.
However when I'm in a 4G area, the modem will not establish a connection. The device has 4GLTE service, but when attempting to connect, I receive "Registering with network......" and then "Error connection failed".
Anyone have any ideas how to get this thing up and running in a 4G service area?