I want to up 8210 to 3315

I want to up version 8210 to 3315 for can write thai message.
I have file flash version 3310 to 3315 ( can write thai message ).
Please help me ! I will attach file 3310 to 3315 to you. Please modify file for can write thai message or solution step by step to me.I don't know address for use? please tell important and description of address. Thank you so much:(

wuttipon: don't double Your messages on the same forum.
8210 can't "up" to 3315.
The differences between the phones are too big.