How to solve certificate invalid according to phone's date for nokia 7210

SOURCE: I forgot security code of my phone (Nokia 7210) and can't access

You can try this link;

http://www.unlockme.co.uk/security.html

I hope this will help you to unlock the security codes.

SOURCE: When i downloding from that

Dear user,

these certificates maybe the net related certificates as u said it happens during download, try updating these certificates if possible, this will be available in the menu when you open your browser

SOURCE: software to reinstall the nokia

Give the Mobile Phone to nearest store they will do it.....

SOURCE: PC suite certificate is not

Please check and adjust your computer's date and time. Also, check your phone's time and date setting, because if they sync between computer and phone it will do the same thing

SOURCE: while downloading applications from nokia ovi

Pl. get the firmware updated from the nearest authorised service center which should take care of your problem