Unable to update to ios 14.2
yo. I was trying to update my iphone 7 plus but it keeps on saying that i am "unable to install update." i've tried restarting my phone and clearing up some space. i have about 5.5 gb of space available. i haven't tried using itunes, though i assume that also wont work, so please leave some solutions. thank you so much!
edit: i just realized my laptop isnt good enough to get itunes, so that's out of the picture
iPhone 7 Plus