MS156 connector is more popular to used for modem,but some kinds of connector seems the same as MS156.
We notice that most people use the following test connector for their modem and get good feedback! 
Would like to see if someone who use this kind of connector ,any helps ?
http://www.rfsupplier.com/antenna-connector-crimp-plug-modem-venus-21haier-ce210-p-1894.html
http://www.rfsupplier.com/test-probe-connector-ms156-plug-crimp-right-angle-connect-p-2295.html
Thanks !