A SOLUTION WITHOUT RESET/FORMAT OR WHATEVER.
This is a 30 SECOND SOLUTION SO FAR BY MAGIC.
-Change your date NOT BACKWARD but FORWARD.
For me it was on 1 june 2009 and I changed it to 1 june 2010.
And believe me there was a pub for 2010 Fida WorldCup in SA
On TV And by some how the stupid “expired certificate” message
Is no longer there. I can install all compatible app on my
Nokia 5800 even when restored my date to normal I can still install
ALL Compatible: ovi store app, google map, fring, nubizz … All.
IF YOU GOT RESULT JUST COMMENT A THANK TO ME AND I
WILL APPRICIATE-