Achievements Sync Problem to Game Center

Question

I have an iPhone 4s and I just made a Game Center account.I've been playing many games with compatibility to Game Center achievements for a long time now, such as tiny wings, subway surf and many more. I felt like playing tiny wings or subway surf. As soon as I started a level, achievements began to pop up one after another. Not all of the achievements popped up. The only achievements that did pop up were the ones that I had already met the requirements for. For example, subway surf have 37 of 42 achievements. i done 37 achievements its oke! after, i done other 5 achievements but it still not recorded game center. many games will doing this problem. i checked 3G connection, game center account its working. No problem in other games.
any idea?

Answer 1

I have an iPhone 4 running iOS 5.0
I also had the same problem where entering my Apple ID and password would just get me into an endless loop of the Location (country) page and date-of-birth page.
Here's what I did...
1) I downloaded a free game app that works with Game Center...Run, Run, Chicken v.1.1
2) I opened the app, then closed it. When I opened it again, it asked me if I wanted to use an existing account or create a new account for Game Center. I chose to use an existing account.
3) I entered my e-mail address (in my case, my Apple ID) and password.
4) I had to verify the Location (country) and date of birth.
5) Then I went right to the terms and conditions page, and upon acceptance, I got to the Game Center set up. I completed the set up.
6) When I opened the Game Center app on my iPhone, I was able to get into Game Center without any sign in problems.
Hope this works for you.