which network provider

Apologies if this has been covered before but I cannot find it when I search past threads.

I have a 6310i that was unlocked and was running on an orange sim card. but it has now gone into the restricted mode to unlock it i need to find out the service providers details I am assuming this will be the original service provider. How can I find this out ?
Thanks

just try them all 1 by1,
or the easiest way,,,is to use a motorola test card sim,,,and then go to wap settings,and look what provider it say there.
but i a bit puzzled,u say was on orange?????
and now it gone to restricted mode????????
do u mean u put orange sim in,and it ask for restriction code///ie unlocking code?