According to pages 3 and 20 of the manual, the USB727 does not support 4G LTE.
http://s7.vzw.com/is/content/VerizonWireless/Devices/Verizon/Userguides/modem-verizon-wireless-usb72...
According to this webpage:
http://vzam.net/download/supported.aspx?cat=2
Only the LG VL600 and USB551L have VZAM support.
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