What is iPhone baseband?

1. The iPhone baseband is the communication system of the iPhone. It is a program used to control mobile phone communication, telephone communication, WiFi wireless communication, and Bluetooth communication.

2. The iPhone has related communication hardware, which needs to be driven by the baseband communication system. Only with a properly working baseband can you make calls, send and receive text messages, and use 3G functions. The steps to check the iPhone baseband version are as follows:

1. Open the iPhone’s “Settings”.

2. Then click "General".

3. After entering, click "About This Mac" at the top.

4. Then scroll down to find the "Modem Firmware" column. This column displays the iPhone baseband version.