Incorrect SIM

Incorrect SIM message might be followed by a “Please enter special code” message. This means your AirCard modem is MEP locked.

Some service providers configure their GSM Sierra Wireless AirCard modems during the factory calibration process for use only on their networks. Sierra Wireless AirCard modems that are configured this way (MEP locked) will work only with SIM cards from their parent service provider.

Mobile Equipment Personalization (MEP) is a GSM feature that restricts the use of mobile equipment to specific SIMs. An MEP code may be used to remove the lock, allowing SIM cards from any service provider to be used in the AirCard modem.

If you would like to use your GSM Sierra Wireless AirCard modem with a different service provider, you must obtain the Sierra Wireless modem’s MEP code from the service provider that sold you the Sierra Wireless AirCard modem.

NOTE: Sierra Wireless cannot provide you with an MEP code.

For example, you may have an AT&T modem made by Sierra Wireless and see that it is locked to work with AT&T SIM card. The AT&T Communication Manager displays a message such as “Wireless device is locked”.

If you would like to use a T-mobile SIM card or you’re traveling to Europe and want to use a local SIM card, you would need to contact AT&T support and request a subsidy unlock code (MEP code) from them.

You can order an unlocked Sierra Wireless AirCard modem directly from the Sierra Wireless Web site:
http://www.sierrawireless.com/wheretobuy/onlinestore/default.aspx