XS++ 3.1 Guide-Flashing, Customizing, Recovering

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As you can see here, Operator is changed from "T_MOB_INT_A" to "S_ASIA_LEVAN" and CDA is changed from "CDA102511/12 R12A" to "CDA102295/1 R2A".
I think I should update the firmware to fix these problems since current one is not very new. But because I'm very new to updating and modding, I don't know what firmware I should choose. So please help me and answer following questions.
1. Which Firmware should I use? Which Main and FS, which region?
2. Which CDA I should choose? I can't find CDA1022... Is it ok to choose CDA1025 because previous one was CDA1025?
Plus: Is there any way to know if my phone was fully unlocked? Because if it is, I think best option is to use SEUS again?

Please help me. I'd really appreciate it.

1. You must use the newest firmware for K800 Main and FS (R8BA024).. use the same region too..
2. Must use the same CDA according to your previous CDA