go to cer.opda.cn/en and register
2.login in the site
3.click on the button ''APPLY CER'' u
will find it on right hand side
upper corner below your account
details
4.fill the details there including
mobile model, imei no,etc
5.wait for 1-10 hrs sorry but you
have to wait if you are lucky you
can also get your certificate in 30-45
mins but i got it in 7 hrs
6.after some time when you login
again in the site click on ''MY
CERTIFICATE'' you will find it above
the ''APPLY CER'' button
7.u will get a chart showing ur imei
no model no and the details
filled by u
8.at the end of the chart u will
see .cer & .key written click on
them and download the two files
9.transfer those files to ur mobile if u
have downloaded it in ur
computer
10.start free signer and goto options
and then settings
11.in settings u will see a option
'sign cert' the 4th option click on
that and select the .cer file from the
location where you have
kept it.
12.in settings below sign cert there
is sign key click on that and
now select the .key file
13.ok you got it dude you have done
it now add task and when
you sign any app do not click on the
option ''self sign sis'' always
click on ''sign sis''