I’m using a Nova R410, a Hologram SIM, and the latest version of the firmware:
L0.0.00.00.05.08 [Apr 17 2019 19:34:02]
I’m using AT command info found in, “SARA-R4 series, AT commands manual (Document number: UBX-17003787, 11-Sep-2019).”
I’m trying to make best use of the +UMNOPROF command for selecting an MNO (pp. 59-61). In the manual, section 7.15.1 indicates that a list of available profiles can be obtained like this:
Section 7.15.2 includes an example of the returned list of profiles known to the device. The first two listed are:
0: SW default
1: SIM ICCID select
I believe profile 0 was the same in the previous firmware version, but that profile 1 is new. Confusingly, the next section (7.15.3), on the same page, lists the all possible profiles (for all R410 modules) and begins with:
1: SIM ICCID select
Question 1: is profile 0 “Undefined,” or is it “SW default”?
Question 2: if profile 0 remains “SW default,” then what is the difference between profile 0 and profile 1. That is, when is it best to choose profile 0, and when is it best to choose profile 1?
Trying to Use Profile 1 (SIM ICCID select)
If I select profile 0:
The device will reset and then register (on ATT in my situation). If I then select profile 1:
The device accepts the AT+UMNOPROF=1 command and returns “OK,” but the settings doesn’t “stick.” That is, if I ask for the current MNO profile,
the value returned remains 0 (not 1), and the device continues to register on ATT.
So, it seems the device will not accept profile 1.
Question 3: does it fail to accept profile 1 because of the Hologram SIM or for some other reason?
Profile 2 (ATT) Doesn’t Seem to Work Either
If I then select profile 2 (ATT),
The setting “sticks,” and,
returns 2 (ATT) as expected. However, it never registers again (I only left it trying for 6 hours). Each time I issue command,
the device responds with,
+CREG: 0, 2
indicating the device is, “Not Registered but Searching.” Cycling the power doesn’t help.The only solution I have found is to reset the profile to 0,
after which it registers within 30 seconds.