Add New contact to SIM Card
Delete contact from SIM Card
Modify SIM Contacts

useful information:
- Phone type (GSM, CDMA etc.)
- Phone number (if available)
- IMEI of the device
- SIM state (SIM absent, network locked, PIN required, PUK required, ready)
- SIM country ISO code
- SIM operator code
- SIM operator name
- Network type (GPRS, EDGE, CDMA, UMTS, HDPA etc.)
- Network country ISO code
- Network operator code
- Network operator name
- Network service state (registered to network, network not available, emergency numbers only, service powered off)
- Network selection status (automatic or manual)
- Roaming status (active or inactive)
- Voice mail text ID
- Voice mail number