SDX60M

The Qualcomm Snapdragon X60 5G Modem is the baseband chipset used in the iPad mini (6th generation), iPhone 13 mini, iPhone 13, iPhone 13 Pro and iPhone 13 Pro Max.

it is also known as  in firmware.

Known Firmware Versions
1.00.03    15.0           (Build 19A346) 1.13.00    15.1 beta      (Build 19B5042h) 1.14.01    15.1 beta 2    (Build 19B5052f)