Recently l changed my phone number in my microsoft account, then I run into this problem 

I came back to the US from China, of course I don't have any reception for my old phone, how would you expect me to get the code? Plus, why a 30-day waiting period is needed while I have alternate email addresses and other information provided. 

It's fine to wait for a month, but what's worse is that my XBOX services is limited! I can't have access to see my XBOX LIVE Gold status, and I can't have access to free games and xbox fitness, which means that i paid money for no service for a month. 

How can I solve this problem in an easier and faster way? Seriously, in the 21st century, a month waiting period is unbearable.