Origin login is currently unavailable.

That has nothing to do with Simcity updating and everything to do with corrupted files in Windows Framework.  You need a Game Adviser, but when it happened to me, I ended up with a different PC, a different Windows, and a different browser before Origin would let me log in normally (my system's date and time were always the correct ones for here in Central Time Zone).  

https://help.ea.com/en/help/faq/using-ea-help/

check your pc's date and time setting.  i tried fixing that and problem fixed

This worked for meeeeeeeeeee Thank you(:

Which time, the ea time or time of where I am?

So I tried every single thing I could think of. Then I came across this thread that said origin will check your computers connection before actually checking its connection to its servers. So I thought him ill just run a windows connectivity test and it said I was having issues connecting to a port. So I exhausted a couple more ideas until I found one that worked. Go into internet explorer and follow these steps.

Under tools>internet options>advanced>reset .

Did this Then boom origin worked. Hope it works for you 🙂

Thank u so so much that works fine 😕mileyvery-happy:

this worked. thank u very much 😕mileyvery-happy:

Changing date and time helped, thank you.

Time/Date correction worked!  Thanks!

Thank you soooo much, the Internet Explorer>Tools>Internet Options>Advanced>Reset WORKED!, I have been dealing with EA's miserable tech support for hours upon hours and have managed to accomplish nothing.