These are commands on how to find the firmware and baseband variety (modem firmware) your iPhone is presently running.

Step One
Press to launch Settings from your Springboard.

Step Two
Press to pick General from the Settings Menu.

Step Three
Press to pick About from the General Settings Menu.

Step Four
From the about video screen you can find your firmware variety under the Version label.

Scroll down and you can find your baseband variety under the Modem Firmware label.

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