ok so today i updated to rogeros 4.21 cfw and tryed to mount dev_blind and it didnt work :| after a bit of searching i have found this program which bypasses the update and allows you to sign in
EDIT: after a little thought this tut will work on any cfw with the 4.25 sen enabler installed as all it does is bypasses the update
ok so first of your going to need this download:
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heres a pic of avast virus scan
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ok so once youve downloaded lg5tool you need to open the .rar folder and run the lg5tool.exe
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now press start proxy and goto your ps3
goto network settings/custom/wireless then select auto on all other than proxy and enter the ip given inside lg5tool then save settings and reboot ps3
sign in and enjoy
NOTE: lg5tool will close everytime you sign in but just restart it and press start proxy to sign back in