When I try to install any programs from the PC (.sis files), the error message 'installation security error - the certificate validation failed. Installation is not possible.' appears on the phone. Please help as I just got the Doom game and am eagerly waiting to install it on the 9500.
'Software installation problems
I don�t remenber very well how 9500 works. But, is not something, in aplications options, only allow signed programs? pass to No...