In case you do not have a phone number to register and activate a mig33 id you can reserve the id what you want. If you remember a nice id to register, just go from the normal process which you register the ids. And for the Mobile Number you can write any unreal phone number you want to. You can register but you cannot get activation code. Then register your id, but you must remember your password. So later when you get a phone number to register your id, you can login and in the activation window just take resend code and write your real phone number. You will get the activation code. Now you can activate the same id and use it... 
