Sierra Wireless Airprime M7345 LTE/HSPA+ 42mbps 4g Card 04x6014 for IBM Lenovo Thinkpad 8 L540 L440 T431s T440p T440 T440s T540p W540 X240 X1 Carbone for IBM Lenovo Thinkpad 8 L540 L440 T431s T440p T440 T440s T540p W540 X240 X1 Carbone