this is posted in the wrong section.
definitely do not upgrade your phone over the air if you have 4.4.2 and it is a galaxy s5.
s5's that are on 4.4.2 kitkat are not bootloader locked and are highly desireable in aftermarket sale. your best bet if you "want" lollipop is to root and do a custom rom like cyanogen 12/13. i think there is even a 6.0 marshmellow rom too.
otherwise if you upgrade to stock over the air 5.0+ you will be bootloader locked, unable to ever revert back to kitkat, and unable to root and do a custom rom. 9 months later and nobody has cracked the bootloader and at this point it is likely nobody ever will with 6.0 marshmellow around the corner.
because of that your phone is probably worth $50-100 more than a 5.0+ s5 for that reason... there are those out there that would love to get their hands on your phone and root it and will pay more since you are still on kitkat and fully unlocked.
for further help to you and getting your phone the way you want it you need to head over to the xda forums.
http://forum.xda-developers.com/galaxy-s5