| Error Code | Error Description |
| 2001 | Cannot read message memory setting |
| 2002 | Error setting selected message memory |
| 2003 | Invalid message memory setting |
| 2004 | Invalid message memory type |
| 2005 | Cannot read modem manufacturer |
| 2006 | Cannot read modem model |
| 2007 | Cannot read modem IMEI |
| 2008 | Cannot read modem firmware revision |
| 2009 | Invalid PIN |
| 2010 | Unknown error after sending PIN |
| 2011 | Unknown error while sending PIN |
| 2012 | Communication error while sending PIN |
| 2013 | Blank PIN is not allowed |
| 2014 | Error sending PIN. |
| 2015 | Modem is waiting SIM PUK to be given |
| 2016 | Unknown error while checking PIN status |
| 2017 | SIM card is damaged |
| 2018 | No SIM card is inserted |
| 2019 | Invalid or wrong PIN |
| 2020 | Invalid or wrong PUK |
| 2021 | Invalid PIN status response |
| 2022 | Communication error while checking PIN status |
| 2023 | Error checking PIN Status |
| 2024 | Unable to read SMSC from SIM |
| 2025 | Unable to save SMSC |
| 2026 | Cannot read battery charge level |
| 2027 | Cannot read own number |
| 2028 | Invalid value for delay after PIN |
| 2029 | Cannot read IMSI information |
| 2030 | Error verifying PIN status after full functionality mode |
| 2031 | The modem is not in a state to accept AT Commands |