Help!! My galaxy s6 would no longer recognize my pin.

I was told by seller to do a factory reset. But now it wants to verify google account. Only problem is the only account it will recognize is my work account which is governed by Okta. This mean it wants me to run Okta verify to get a number. Well how am I supposed to do that if I can't get past the google verification screen. I need a way to bypass this. Anybody really know how? I've googled my heart out and only find how to reset - not what I need. :mad:

Would a custom ROM help with my speen issues?

Last summer (last year) my relay started getting slow, I then installed JB on it using odin and it started getting even slower, the screen sometimes tears when I move and on rarer ocasions even by itself with no movement, it also randomly turns the screen blue and I have to force-restart it. I tried going back to ICS using odin but when I do, wifi never works... here we are over a year later and the slowness is getting almost unbearable...

I bought a new S5 from ebay but it came defective and the exchange also came defective... while I deal with getting a refund and getting a new S5 im still stuck using my old, slow, relay.

So since i cannot go back to ICS and JB as been a torture since day one, you guys think one of the custom roms on this site could make the phone faster for the time being?

Are there any roms that would improve battery life?

I have the Sprint Galaxy s6, which is fine phone, except the battery is awful. If I unplug it from the charger at 6am, it's down to 12% by 1. Would a new rom help? I haven't rooted the phone yet, but if it'll improve the life of it I'll do it.