I’ve been experimenting with the mangOH Yellow over the past several weeks, and I simply can’t get it to connect on LTE. It always connects to T-Mobile’s 2G network. I’ve tried everything. I’m using the 3-month Octave trial, and I’ve also tried a Hologram SIM card.
Various relevant info:
Firmware Version: SWI9X06Y_02.32.02.00 c2e98c jenkins 2019/08/30 07:28:21 Bootloader Version: SWI9X06Y_02.32.02.00 c2e98c jenkins 2019/08/30 07:28:21 MCU Version: 002.013 PRI Part Number (PN): 9909138 PRI Revision: 001.001 Carrier PRI Name: SIERRA Carrier PRI Revision: 001.027_000
If I prevent GSM fallback by doing:
cm radio rat LTE
…then it just never registers on the network. I end up seeing stuff like this:
root@swi-mdm9x28-wp:~# cm radio Power: ON Current Network Operator: AT&T Current RAT: Module not registered on network, RAT not available Status: Registration was denied, usually because of invalid access credentials (LE_MRC_REG_DENIED) Signal: Strong signal strength (4) PS: Packet Switched Not registered (LE_MRC_REG_NONE)
(It also sometimes shows Verizon instead of AT&T)
As soon as I allow GSM fallback:
cm radio rat GSM LTE
Then it eventually connects to T-Mobile:
root@swi-mdm9x28-wp:~# cm radio Power: ON Current Network Operator: T-Mobile Current RAT: GSM network (LE_MRC_RAT_GSM) Status: Registered to a roaming network (LE_MRC_REG_ROAMING) Signal: Strong signal strength (4) PS: Packet Switched Not registered (LE_MRC_REG_NONE)
I’m in a pretty rural area, so I suppose that poor coverage is a possibility, but I read that AT&T has nationwide LTE-M coverage. AT&T definitely has LTE coverage here, so wouldn’t that mean that LTE-M should work too? I can’t get the Hologram card to work with AT&T or Verizon’s LTE networks either, and I believe it is supposed to be compatible with both carriers. Same thing – LE_MRC_REG_DENIED. I tried the AT&T firmware as well…didn’t seem to matter.
Here’s the output of AT+COPS=?:
+COPS: (1,"T-Mobile","T-Mobile","310260",0),(1,"AT&T","AT&T","310410",7),(1,"313 100","313 100","313100",7),(1,"Verizon","Verizon","311480",7),,(0,1,2,3,4),(0,1,2)
Am I going crazy? Am I missing something simple?
Thanks for any advice!