need AT command for sim reset

is there any AT command which can reset the sim in a gsm usb modem. now i am using a MOBIDATA E66 modem. so if any can provid me the command or know similar command then please help me.

when i communicate with the sim if the connection is lost or modem is disconnected then the sim remains at that state (say i opened a menu and then got disconnected). so i need a reset command which will send the sim to the initial state开发者_StackOverflow.

thanks..arefin

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Have you tried AT!GRESET or AT!RESET? I don't know if they are supported in your modem.

If none of them are working, use AT+CLAC to get the modem's available commands and search for some kind of RESET/RST command.

If you can't find a reset command, try turning off and on the modem radio using AT+CFUN=0 and AT+CFUN=1.

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On TC35i (and probably elsewhere too) you can use AT+CFUN=1,1 (the second 1 means reset). You need to reconnect the serial interface though.

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I know this question is old but giving my answer for those who will find the same issue in future.

Do the soft restart of gsm and that should solve the problem via an at command. For u-blox chips it is AT+CFUN=1,16.

I did it and it worked like a charm.

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For Quectel EC21 modem Im use:

AT+CFUN=0
// delay
AT+CFUN=1

This is enough for me, but also possible to send:

AT+CFUN=1,1

To reset the ME itself

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Press x for back to Main Menu, and wait many seconds. When displayed OK0, input the password. Default password is 1234.

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I know this question is old but giving my answer for those who will find the same issue in future.

Do the soft restart of gsm and that should solve the problem via an at command. For u-blox chips it is AT$ENHRST=1, 0.

I did it and it work like a wonder.

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I am using SIM800L:

According to datasheet

ATZ resets configurations (tested and works)

AT+CDSCBresets Cell Broadcast (tested and does not work)

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I have sim issue device one time data or clock the connection (contact) lost in sim slot , by the time sim network it will lost, and how will get back sim network.

without restart the device i need do

before sim connection lost

lte_gps_test 'AT+CNUM'

AT+CNUM
+CNUM: ,"918431234564",129

After sim connection lost

lte_gps_test 'AT+CNUM'

modem_response:

AT+CNUM
ERROR

it will come continues

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I am using Quectel M66

according to the datasheet, You can use commands like AT+QPOWD==1 Which would simulate a Device reboot.

AT+QPOWD Power off

Example AT+QPOWD=0

OK //Urgent power off, returned OK

AT+QPOWD=1

NORMAL POWER DOWN //Normal power off, send out URC“NORMAL POWER DOWN”

2.21. AT+CMEE Report Mobile Equipment Error

AT+QPOWD Power off

Write Command

AT+QPOWD=

Response

When =0 OK

When =1

NORMAL POWER DOWN

Maximum Response Time 300ms