For a long time i have been using the pppClient interface with my MC8705 to put the RB411 on the ATT cellular network. I have upgraded a 411 to 5.25 and tested 6.0rc14 as well. Both versions of software behave basically the same in regards to the LTE. When i enable the interface and use the interface lte info 0 command you can see that the radio is connected. When i view the ICCID from the ATT web site i can see that the interface is getting issued an IP address. However for some reason no new IP addresses show up. If i manually add the IP address from the ATT site everything will work fine. Any thoughts why i would not be getting an ip address when the interface connects to ATT?
/interface lte
set 0 apn=mycustomapn.com.attz modem-init="" \
name=lte1 network-mode=auto password="" pin="" user=""
interface lte info 0
status: call in progress
pin-status: no password required
functionality: full
manufacturer: Sierra Wireless, Incorporated
model: MC8705
revision: T1_0_3_2AP R361 CNSZXD00000061 2011/04/15 17:40:48
serial-number: 353567040581123
current-operator: AT&T
access-technology: 3G
signal-strengh: -93 dBm
frame-error-rate: n/a