Ericsson N5321GW 04W3823 3G Module Lenovo Thinkpad WWAN S540 X230s X240s T440 T540p Card Product Compatibility(only): ThinkPad S5-S540 ThinkPad S540 ThinkPad T431s, T440, T440p, T440s ThinkPad T540p ThinkPad W540 ThinkPad X1 Carbon (Machine types: 20A7, 20A8) ThinkPad X230s, X240, X240s Compatible with Operating Systems Microsoft Windows 8.1 32-bit, 64-bit Microsoft Windows 8 32-bit, 64-bit Microsoft Windows 7 32-bit, 64-bit