Should I update my htc one m8 from KitKat 4.4.2 to lollipop or Marshmallow?


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Oct 4, 2015
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Hey guys. First timer here. I'll try to outline my situation.

Back in 2014 I got a used HTC One M8 on amazon. I received the phone and it worked great, but I've begun encountering issues in performance dating a year and a half back. The phone was unlocked from AT&T and I use it in Mexico with my Mexican carrier, works fine. I've had to format the phone a few times since each time the performance gets a lot better and when it starts getting worse and struggling to open simple apps like Instagram I just do it again and voilá. The phone shows the AT&T screen during each boot-up and includes the bloatware every time I format it. I still have KitKat 4.4.2 since the software updates are done through AT&T and I've never been notified of a software update.

Now I'm looking into a manual update but I don't know how to do it or if I should go to lollipop or all the way to Marshmallow (or if there is something newer that I don't know of.) I found this neat instruction set from HTC on how to do a manual update on an AT&T phone if you're out of their coverage.

HTC One (M8) AT&T - Updates & downloads - Support | HTC United States

Now, I come to ask you, people of androidcentral.

Should I follow what the page indicates, which seems pretty straight forward?
Should I update to Lollipop or Marshmallow?
How do I choose which one to update to?

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