2 day limit

If I upgrade from Basic to Gold will I still be limited to completing a game in two days on my mobile phone?

I'm not sure what that means...

With gold I get 25 moves per day on my mobile, I think

Yes, upgrading to Gold takes three moves a day up to 25 on my mobile.  What I mean is that it's telling me on a game I started under my Basic membership that it is only a two day game.  I guess this means that I have to complete the game within two days or it just ends.  I was wondering if I upgraded to Gold if I would have longer than two days to complete a game.

No, it's not a 2 day game, you have 2 days to make a move. Then your opponent has 2 days to reply, etc..... you can move faster if you wish, of course.