Rejecting cause

Hi, all!

If I try to change to my Test-Network with my mobile phone (not known from network and not yet authorized!!) I can't change (of course). Then I authorize my phone and I try again. It does not work. I have to turn off and on my phone in order to change to the network.

I got the information that I can solve this problem by changing the reject cause (location updating reject cause). Unfortunately I don't know any cause that say the phone "OK, try again later", so that my phone will try again later.

Can someone help me and say me a code? I have to give a numeric code, but I don't know any. It was suggested to send a "network failure" or "congestion" or "overload", but I don't know the code for these cause...

Thanks for your help!