NOTE:
If your phone was hacked
already,you dont need this trick.

Requirements:
1.All Expired Certificate
Application that is hard to install.
2.Your S60v3 phone that is not
hacked yet.
3.File Manager(built in to your
phone.)
PROCEDURE:
1.Open your file manager and
locate the file that is
unsigned,dont open,just click
view details and look for the
date ie,month/day/year.
2.For Nokia,Go to
settings,General,Personalization,Date
and Time and Set the Date back
as what you see on the details of
the file,for other phone,refer to
your phones manual on how to
set the date of your phone.
3.Go back to the file and now hit
install,If you install that file
successfully,congrats you
already learned on how to
bypass that certificate error
when installing,and set back the
date of your phone to normal.

NOTE:
This trick will not 100% work on
some application specially those
cracked version.This tricks works
only for applications with an
expired certificate.