try to re-flash ure baseband ... that's work !
Follow this tutorial :
Keep spica_jc3.ops in Select OPS field.
Click Reset Files to clear the fields.
In Select Images to download panel, Select I570EXXJA1_CLI32638_Bootloader.tar into BOOT field,I570XXJB4_Phone.tar into PHONE field, I570EOLBJB3-CSC-CL167487-OLB.tar into CSA field, and let the PDAfield empty.
In Debug Option panel, tick Debug Only and PDA Format option. Don’t tick One Package option in Option Panel.
Click Start and watch the progress bar and timer, wait untill PASS message appear on Message box.
Disconect the phone from PC, remove and insert the battery, start the phone in download mode again then continue to Flash III.
then:
Keep spica_jc3.ops in Select OPS field.
Click Reset Files to clean the fields.
In Select Images to download panel, Select I570EXXJCE.tar into PDA field.
If you get an error dialog, rename the I570EXXJCE.tar into I570EXXJCE_PDA.tar and insert into PDA field again.
Don’t select One Package option and Debug Option.
Click Start and watch the progress bar and timer, wait untill PASS message appear on Message box.
The phone will restart and you will get the Eclair screen .
You can DL that files from
samfirmware.com