SIM card's location.

There is an Arduino GSM shield. How to get sim card's location? I've looked for it in libraries ? 404. And on what accuracy can i count if there is no internet connection and if there is?

oh snap, GPS receiver is needed, right? Thank you.

If you have access to a cell location database then while you're online it would be possible to get a vague idea of where the device is based on which cell you are registered with. Otherwise, the modem does not give you location data. You need GPS for that.