“opda.cn” is chines web site which provide free Symbian developer certificates used to sign Symbian applications. OPDA Developer Certificates are very powerful because thy do not restrict functionality of mobile applications. This is very important, specially when it comes to using applications like HelloOX2 (Used to hack Nokai N97, 5800 and such Symbian S60v5 devices). Also another important this is that applications signed with OPDA Developer Certificates last longer. The validity period of OPDA Developer Certificate is usually 20 years.

How to get OPDA Developer Certificate

OPDA Team [...]