I checked my MXPE for system updates and received the message that my phone software is up to date, even though the last security patch received was February 1 -- which was before I purchased the device. So I just called Verizon Customer Service and explained the situation -- including the fact that there are thousands of MXPE users on Verizon, that many of us have been waiting for more than three months based on the understanding that Verizon customarily tests software updates for network compatibility before passing the updates through to customers, and that some MXPE owners have stopped waiting for the update to come through and are now downloading the May 1 security patch by pulling the Verizon sim card. After consulting internally, they confirmed what I suspected: Because the MXPE is not a branded device sold by Verizon, the Verizon network does not typically process updates pushed by the manufacturer. I was told that they would submit my request to add the MXPE to their list of devices for passing through security and other manufacturer updates, and that it would take a few days to process that request, after which they will call me back to let me know whether the patch will be pushed or I'll need to download it manually by pulling the sim card. If and when I hear back from them, I'll post their response here.