What is OPDA Certificate and Key.
(While installing unsigned Application We get warning 'Certificate Error')
Ok Just Follow this Simple step to get your OPDA .Cer and Key
1. Go to http://cer.opda.cn/en/
2. Register a free account there by clicking Register @ Top right
3. After Complete the Registration login to your account
5. Wait 5 sec or Click on My Certificate link
6. Click Apply cer button
7. Fill the Details Done....!!!
You will get your cer and key with in 24hours.
When you login to your account you will see right of your IMEI like this

1. Click On the .cer to download the certificate.

2. Click On the .key to download the key file.

After Got your OPDA .cer and .key visit here to get FreeSigner and Complete tutorial
Post Your Valuable Feedback Here..
Thank u great post. for the last two month i was trying to get certificate for my phone but now i got just in some hrs. is there any software to sign from computer?
thnkz man u really helped.
+1 good job
thanx man great tut
Muchas gracias (Thank you very mech my friend)