The Raven XW as jismail pointed out is EOL. Changing out the radio module will not change the network or technologies it supports.
Your best bet is to leverage the credit value of your existing device while replacing it with something new. Check out http://sierrawirelessupgrade.com/ and contact a vendor to get a quote.
Checkout the RV50X for your application as it contains the same interfaces as the Raven XE, plus USB.