Im not sure if this will work for other counties...Im from Philippines so all my settings (pre-config;product code,etc) are configured to my specific country.Here is the procedure on how I successfully revert my firmware to DX (previously I was using European firmware) through couple of days searching....
1. Manually flash your firmware to S8500DXJEA FULL :
a. Here is the link to file: You are not allowed to view links.
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Login b. Here is the procedure: You are not allowed to view links.
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Login 2. Set your CSC Pre-config setting to XTC(Philippines)
a. Click the Keypad and type *#5239870*# choose 2 Pre-configuration
b. Type *#27236*# then confirm
c. Choose XTC as CSC Pre-config then Install
3. Update S8500 DXJEA to S8500DXJH1-UP
without ticking BOOT CHANGE;FULL DOWNLOAD;MASTER ROM a. Here is the link: You are not allowed to view links.
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Login4. Change your Product Code permanently: for me its XTC(Philippines)
a. Download Qualcomm Drivers : You are not allowed to view links.
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Login b. Download PSAS 1.5 : You are not allowed to view links.
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Login c. Download the procedure : You are not allowed to view links.
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Login d. Set your phone to USB DM/CP : type *#197328640# [8] Common --> [7] SERVICE Configuration--> [2] DIAG SERVICE Config --> [2] USB DM/CP
e. Connect the phone to PC using USB cable
f. Install Qualcomm Drivers
g. Install PSAS 1.5 then Run.
h. Follow the procedure ( letter c )
i. Disconnect the cable
j. Reset your phone to UART/AP :type *#197328640# [8] Common --> [7] SERVICE Configuration--> [2] DIAG SERVICE Config --> [3]UART/AP
5. Run regedit on PC: Follow HKEY_CURRENT_USER \ Software \ Samsung \ Kies (right click on Kies then delete it)
6. Uninstall old Kies and Install Kies 2.0 : You are not allowed to view links.
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Login Samsung Kies must detect your phone from this moment and it must give you an option that a new firmware version is ready to be installed
If I have forgotten something or if the procedure is not clear to you, just reply to my post and I will answer you queries as much as I can. I am not a Samsung tech or something, I am just a Samsung wave owner who wants to maximize and explore my phone's capabilities that's why my phone also undergo several times of manual flashing and configuration before I come up with this....
Hope this topic helps us ASIAN WAVERS....CHEERS