Sony Ericson w16i walkman phone stock rom Instalation

Dear Frnds.
I have a sony ericson w16i Walkman phone .I have rootedit and installed Ginger Dx V22. on it now i want to update it with new stock rom .Kindly tell me which Latest rom Is installed on it.The Baseband of the phone is M76XX-TSNCJOLYM-53404015, kERNAL ver. is SEMCUser@SEMCHost#1.CPU ARM6-

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