Huawei 3G Module SIM problem

Balaji Selvam

Hi All,

We are using the Huawei MU509 3G Module in the AM335x TI processor.
When we turn ON the 3G Module it is working fine and USB core driver understand the device as a
USB device.

We can able to send and receive the AT commands via USB and UART. But we cant access the
SIM interface.Please see the following response

AT
OK
ATZ
OK
AT+CPIN?
+CME ERROR: SIM failure

please help me to solve this problem.

Regards
Balaji

over 12 years ago

0 Biser Gatchev-XID over 12 years ago

TI__Guru**** 393215 points

Hi Balaji,

From what you have listed it seems to me that the problem comes from the 3G module you have. The response you receive to AT+CPIN? looks like it's generated from the modem. You should check your SIM card - it could be corrupted.

0 Balaji Selvam over 12 years ago in reply to Biser Gatchev-XID

Prodigy 215 points

Hi Biser,

I have inserted my working SIM on my phone but it still says the same error.

Thank you

0 Biser Gatchev-XID over 12 years ago in reply to Balaji Selvam

TI__Guru**** 393215 points

Balaji,

One possible reason could be the SIM is 1.8V only. I would suggest you find a 3.3V SIM card.

0 peter Auhter over 12 years ago

Prodigy 20 points

HI All.

I also met this problem . cant access the SIM interface .

ati
Manufacturer: huawei
Model: MU509
Revision: 11.813.01.04.00
IMEI: 354525045129689

OK
at

AT+CSQ
+CME ERROR: SIM failure

so , do u slove the problem .