When I worked in Business Tech Support @ Sprint we did have the ability to PROMPT the phone to get updates that we saw were available for it... But in my experience, the phones NEVER took the prompts. I always assumed it was because our system was behind and the phone already had the updates.
It was also not very clear what these updates were... Sprint software? Device firmware? I wasn't sure. The version numbers rarely lined up with anything I recognized (like versions of an OS, for example).
Whether it's bs or not, I couldn't say, either... If it's a firmware update and it is released to fix a known issue, sure, but wouldn't more of us here KNOW about an issue like that?