MangOH not Connecting to Mobile with Micro SIM


#1

Hi everyone. Apologies in advance if this is a novice question, but I’ve been racking my brain on this a while.

I have the mangOH Green kit with a Sierra Wireless WP7504 chip attached running a Legato toolchain. I also have an activated Micro SIM card which I can’t seem to get working with the mangOH.

The SIM is new and has been activated with the carrier. I’ve inserted the Micro SIM into the Micro SIM/Micro SD combination slot (the bottom rung), and the main antenna is attached (confirmed as running “cm radio” indicates a signal strength).

The following information is output when running “cm radio”:

Power: ON
Current Network Operator: (blank)
RAT: UMTS network (LE_MRC_RAT_UMTS)
Status: Not registered but currently searching for a new operator (LE_MRC_REG_SEARCHING)
Signal: Good signal strength (3)
PS: Packet Switched Not registered (LE_MRC_REG_NONE)

As indicated, the radio is turned on, as well. To verify, running “cm radio on” outputs “Radio power is already set to ON.”

Is there some way I need to tell my mangOH board to read from the Micro SIM slot as opposed to the primary, Mini SIM slot, or something along those lines? I can’t seem to find a solution either way.

Thank you very much in advance, I greatly appreciate any assistance!


#2

Update: I managed to fix the problem by using a Micro SIM to Mini SIM adapter and using the primary Mini SIM slot instead. If anyone else has this problem, that’s probably the easiest solution.


#3

To switch between the SIM slots, you can do:

cm sim select EXTERNAL_SLOT_1
or
cm sim select EXTERNAL_SLOT_2