[Q] Verizon S5 looking to upgrade to lollipop topic

I currently have an unlocked Galaxy S5,g900v (b), looking to update to lollipop. I use a tmobile sim so I will not be getting any OTA's from verizon. How can i update to lollipop without installing custom rom, and maybe with a tmobile instead of verizon pre loaded apps/settings.

Thank you.