I've had a Blu Vivo 6 for a fraction over a year now (bought on Black Friday 2016 - its actual release day here in the UK) and there's not been a *single* update for it (not even a minor one).
I'm still waiting for BLU to patch the KRACK vulnerability on my phone.
I got a BLU Advance phone for $75 on Amazon. Nice phone, dual SIM, 5.5", 64GB SD card expansion, Android Marshmallow. This just this past summer (just before Amazon took them off the market for leaking data to China).
For the longest time, it bugged me to update the OS, but I thought: "It works. Why update and risk installing crapware?"
Then KRACK happened. And my BLU phone was still asking to be updated.
I saw that the date of the update predated the discovery of KRACK, so I knew that if I updated, it would not protect from KRACK. However, no other update was available, and eventually I figured that perhaps my failing to install a previous update was preventing a newer update from happening.
So, reluctantly, I updated. Immediate regret. First, after updating, there was no other update available. I didn't get to shield my phone from KRACK, and I'm still waiting for an available update.
Second, it installed this new BLU app that kept telling me to register, and also showed me some "great deals!" on services and things I can pay for. Umm, no thanks.
Third, it messed up my keyboard. The BLU phone originally came with this decent swipe keyboard, not just the standard one that came with Google. That disappeared, and it took a whole week for me to figure out that I wanted to install the TouchPal keyboard app, and another week of hesitation while I read reviews about the keyboard app showing intrusive advertisements, and finally I figured out that I could install the "TouchPal For HTC" app that would work equally well but not have the ads. Apparently it still wasn't the same version as previously, as there were a few glitches (e.g. holding down the N key defaults to the letter with a foreign diacritical, not the question mark which is far more commonly used).
So, for my troubles of agreeing to upgrade, I got: no KRACK protection, ads, and a decline in keyboard function.
No thanks, BLU. Can anyone tell me if CyanogenMod or whatever jailbreak is compatible with the BLU phones?