I have played this game, and left some time ago. Now that I have started playing the upgraded version, I need some help. First of all, I sometimes get all the six maps to choose, sometimes I get ' random map '. I don't get why this happens. Also, I would like to know if there is any private room/map feature available on purchase.

If you're not a subscriber ($1.99/month) then you should get the Random Game and have to wait 7 minutes between games, unless you watch an advertisement. However, if you subscribe then you don't have to wait after missions, and you have the choice of the different maps you want to play.

There are no private rooms or maps to be purchased.

It used to be you would be able to use all the maps, but since a few updates they make you pay for that feature. When you played before it may have been the old way. It's month by month paying for it... try it. If you don't like it you can go back to the random version.
Any other problems, Duck?

Thanks. So that means I have post on monthly basis. Not a problem. But I want to play with my friends. Is there any way to play together? Even if ranks differ slightly?

You just have to go to the same map and hope to be on the same side. There's no way you can choose to fly with any one pilot or group of pilots.

One more problem that I just got into now. I bought 'Advanced Access' (basically subscribe) for $1.99 from windows phone store. I got billing confirmation. But now I still get random map option and the wait time. When I tap on subscribe I'm sent to menu. Is this common and has any fix or what? I am confused.

I have read that happening to others, so send an email to echobloom to get it resolved.