how can I relock bootloader? - Sony Xperia M4 Aqua

Guy's I need to relock my bootloader
I tried with flashtool but it's not working

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Just for Info about unlocking bootloader

hi all
i tested if SEUS restore the lock to our bootloader and rechecked my bootloader after restoring my phone to stock it seems that the bootloader stayed unlocked so unlocking bootloader is proved to be permanent unless you locked it again via flash tool and stock kernel for U20i
Minachvim
You are so wrong, neither seus pcc or flashtool relock the bootloader, you can reflash the firmware all the times you want and your bootloader stays UNlocked . The only tool that RElocks the bootloader again is S1TOOL.
ChavitoArg said:
You are so wrong, neither seus pcc or flashtool relock the bootloader, you can reflash the firmware all the times you want and your bootloader stays UNlocked . The only tool that RElocks the bootloader again is S1TOOL.
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i didn't mean to lock the bootloader via flashtool it was only to say that the kernel itself didn't change when used SEUS to restore stock firmware and noticed as side seeing that the bootloader is still intact and unlocked
i already know that only the steps mentioned in Spyder post with s1tool and flashtool can relock the bootloader but i tried to test SEUS if it does anything in that case.

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I to all
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