Hello folks, this is my first official post with exeption to my intro. Please bear with me if this question has been asked, I did search quite thoroughly, as well as I am able to at this point. So I have an HTC One M8 and would like to update the software but I'm not currently with a service provider. I purchased the phone through Verizon but haven't been with them for nearly a year now. Is there a fairly straightforward way to do this? I am tech savvy but don't know how root etc. I'm not even sure if my phone is unlocked etc. Thank you in advance and again, apologies if this has been covered ad nauseam.