I am in china,and my carrier's CDMA phone must use SIM card

. I like 9530 so much that I bought one from ebay. The only way I use this phone is to write my SIM card's A-key\IMSi\ESN into the 9530.But I can not change 9530's ESN to my own ESN.
Does anyone could teach me how to change a 9530's ESN?