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Guessing the Voice LTE is it. Honestly don't know why this feature seems to have 4 different names.What I find under the SIM settings are a voice LTE setting and a separate data LTE setting.

This is the page to check if a phone is compatible with Verizon, but since yours is already activated I don't know if it will say "Compatible" or "already in use" instead:PagePlus has a tool on their website where you check VOLTE compatibility and my Samsung J3 is OK. I haven't found a similar tool on the Verizon website
Back to your original question, if your phone does have VoLTE I agree with what @Unforgiven has crossed off in his first post above. If you only use apps from the Play Store and don't visit dodgy websites the phone should be fine for a few more years. Of course if you can get a good deal on a new one that's always an option.How important is an Android upgrade for us?

both. on the s6, you need it to backup your data. and on the s21, you will need it to transfer that data over.Do I install Smart Switch on my s6 or on my new s21 or both?
The phone has a wired interface, but I think Bluetooth is easier. It usually just connects by itself and starts playing.
That thread reminded me of the late nights when I was tweaked out using meth i actually got flash backs when I was reading about the guy who was reading all the code and and superfish attacks ...I busted a gut laughing but in all fairness maybe he was being attacked but no I do not believe when he walks into a best buy like he said just his presence crashes their computers I do not think so unless you have a pulse generator or jammer in your pocket and it would be so powerful you'd have burns in your crotch lmfao .

DUDE i'm eating lunch......LOLDitch that turd called My Files.
It is like a butthole with tastebuds.
https://f-droid.org/en/packages/com.simplemobiletools.filemanager.pro/
if you feel like it you can learn how to port twrp to your device:I have a Vivo V5 1601 and it's android 6.0 sir... No system updates anymore so I want to root it no matter what.. I'll face whatever the consequences are and fix it on my own.. I'm a good researcher that brings me here.. Been researching how to root my phone for 3 days now..
if you go into the advanced settings>scroll down to motions and gestures>toggle on the "palm to swipe to capture"I am tapping on the little rectangular area that shows when it is closed. I just double tap and the clock comes up. The yellow dot shows up in the left side of that rectangle.
I'd love to take a screenshot of it to show you. How do I do a screen shot with the phone closed?