I got a call from this number today. They asked to speak to a member of my family. When I asked who was calling, they just kept asking for that same family member. Once again, I asked "Who is calling?". The guy refused to answer me. If they call you do not answer. It is definitely SPAM or SCAM.
The caller ID shows the caller as "Novatel". I went to the Novatel website, which is Novatel Wireless, and in the "Contact Us" section of the site they say that they are aware of the calls and warn people not to interact or even pick up.
They have called here 7 times in the last week. 6 of the calls have been blocked by my trial version of CallClerk, which looks like a pretty good deal for those who are looking for a PC solution. I kind of like that better than buying hardware, in case these rats who are calling us figure out a workaround. You can rewrite software and the gent who wrote CallClerk seems to be pretty much on top of it.