BRN404X continuously blinking green - running 4.1.0


I am a first-time Boron user and I am struggling to get the device to connect to the cellular network. I have worked through the setup process and the Device Doctor, as well as looked at the connectivity issue with 4.0.2 firmware, and cannot figure out what's wrong. These lines appear to be looping through the logs in the Device Doctor:

0000600334 [] TRACE: > AT+UCGED?
0000600340 [] TRACE: < +UCGED: 2
0000600341 [] TRACE: < 6,2,fff,fff
0000600341 [] TRACE: < 65535,255,255,255,ffff,0000000,65535,00000000,ffff,ff,255,255,255,1,25
0000600342 [] TRACE: < OK
0000614942 [] TRACE: > AT+CIMI
0000614968 [] TRACE: < 234507088334461
0000614968 [] TRACE: < OK
0000615368 [] TRACE: > AT+CEREG?
0000615372 [] TRACE: < +CEREG: 2,3
0000615373 [] TRACE: < OK
0000615374 [] TRACE: > AT+UCGED?
0000615380 [] TRACE: < +UCGED: 2

Any chance someone could help me figure out what's wrong? Again, device is running on 4.1.0 when not running Device Doctor. The device has never connected to the cellular network.

Those log messages, in particular +CEREG 2,3 typically occur if:

  • The SIM is not activated
  • There is no LTE Cat M1 coverage in your area
  • You're experiencing TAN012

I tried searching for your device or SIM from the IMSI (AT+CIMI) and I could not locate it. This isn't necessarily a problem, but it means I'll need the ICCID to check on the SIM status. The web device doctor log should include it.

I've checked that the SIM is activated, and worked through the troubleshooting of TAN012. Regardless, the ICCID is 89883070000036197232. I also checked AT&T LTE coverage in the area, but I'm not sure if LTE coverage is different than LTW Cat M1 coverage.

I'm not sure why it's not connecting.

The SIM is activated at the MVNO provider which is why I needed the ICCID. It's possible for this to be out of sync with the console, but it appears to be active in both locations.

In theory every location with AT&T LTE, provided by AT&T, also has LTE Cat M1. This is not true for AT&T roaming partners, which can be the case in parts of the mountain west of the United States.

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