nRF9160 AT&T Test SIMs

RE: nRF9160 AT&T Test SIMs

Martin Lesund — Wed, 24 Apr 2019 13:04:04 GMT

Hi Jack,

There is also something that you should be aware of.

If you are trying to configure the default PDN connection then you should set the CID 0.

Because you have configured the context #1 (CID1), but I think you should rather configure the CID 0.

Instead of:

AT+CGDCONT=1,"IPV4V6","m2m.com.attz"

use the following:

AT+CGDCONT=0,"IPV4V6","m2m.com.attz"

RE: nRF9160 AT&T Test SIMs

Martin Lesund — Wed, 24 Apr 2019 13:04:03 GMT

Hi Jack,

There is also something that you should be aware of.

If you are trying to configure the default PDN connection then you should set the CID 0.

Because you have configured the context #1 (CID1), but I think you should rather configure the CID 0.

Instead of:

AT+CGDCONT=1,"IPV4V6","m2m.com.attz"

use the following:

AT+CGDCONT=0,"IPV4V6","m2m.com.attz"

RE: nRF9160 AT&T Test SIMs

Martin Lesund — Wed, 24 Apr 2019 12:22:49 GMT

Which modem firmware are you running?
Could you try to update to the 0.6.8-131 version to see if there are any improvements?

RE: nRF9160 AT&T Test SIMs

hmolesworth — Thu, 18 Apr 2019 00:43:45 GMT

AT&T uses bands 4 and 12 in the USA and Canada; band 12 is not (yet) approved or available for the nRF9160, which means you must use band 4. You can lock to band 4 with the following steps to avoid locking to Verizon's band 13:

The AT host sample started
AT+CGDCONT=1,"IPV6","m2m.com.attz"
OK
AT+CGDCONT?
+CGDCONT: 1,"IPV6","m2m.com.attz","",0,0
OK
AT%XBANDLOCK=1,"1000"
OK
AT%XCBAND=?
%XCBAND: (4)
OK
AT+CFUN?
+CFUN: 4
OK
AT+CFUN=1
OK

However .. we have not (so far) been able to connect to the AT&T network on band 4 even though some smartphones can connect to AT&T on band 4.