Phone goes into PROTECTED MODE : How to unlock it??? - Sony Xperia M4 Aqua

hi guys i have a sony xperia m4 aqua and stuck on protected mode, i haven't the email which the phone registered, because i bought a used one not new, and the person who sold me the phone i don't have any contact with him now, so please any solution to bypass this ?

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Try flashing the stock ftf by flashtool.
Sent from my E2363 using Tapatalk

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mfpss95134 said:
Try flashing the stock ftf by flashtool.
Sent from my E2363 using Tapatalk
Click to expand...
Click to collapse
ok i'll try, but please give a flashtool and the stock ftf ( i don't understand what is a stock ftf )

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First,Install flashtool.
Second,use xperifirm inside the program to download the stock ftf file.
Third, use flashtool to flas
h it.
Then..... done!
If you don't know how to use flashtool,you can find some tutorials on Google.
Sent from my E2363 using Tapatalk

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mfpss95134 said:
Try flashing the stock ftf by flashtool.
Sent from my E2363 using Tapatalk
Click to expand...
Click to collapse
mfpss95134 said:
First,Install flashtool.
Second,use xperifirm inside the program to download the stock ftf file.
Third, use flashtool to flas
h it.
Then..... done!
If you don't know how to use flashtool,you can find some tutorials on Google.
Sent from my E2363 using Tapatalk
Click to expand...
Click to collapse
unfortunately, this solution doesn't works, any other solution please ? !!

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please give me the lastest stock tft for sony xperia m4 aqua E2303

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Chouiyekh said:
please give me the lastest stock tft for sony xperia m4 aqua E2303
Click to expand...
Click to collapse
Download It form xpefirm...
Do u flashed ftf succesfully?
I also bought M4 from "Second hand" - M4 with simlock - after 2 days the Phone Goes into protected mode.
I've flashed latest ftf and everything Works fine, except RIL ... I tried to change IMEI (xposed module) but with no success

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outofmemory13 said:
Download It form xpefirm...
Do u flashed ftf succesfully?
I also bought M4 from "Second hand" - M4 with simlock - after 2 days the Phone Goes into protected mode.
I've flashed latest ftf and everything Works fine, except RIL ... I tried to change IMEI (xposed module) but with no success
Click to expand...
Click to collapse
should i check or uncheck this ?
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and what the RIL mean ?