[Premchandmahaur]

Hello sir, i have nokia 2690 .whenever i goes to download sign virsion app from anywhere or ovi.com,nokia.mobi it not download app it show error (no valide certificate on sim or phone) how can i dowload sign virsion app

[jimmyireland · Accepted solution]

http://discussions.nokia.com/t5/Pool-of-Knowledge/Certificate-not-on-phone-or-SIM-for-S40-phones/td-...

Also

Try checking in your Menu > Settings > Security having a look at Authority certificates or User certificates - to view the list of the authority or user certificates downloaded into your phone.

Also trying updating your phone's firmware to the latest version using Nokia Suite.

http://europe.nokia.com/support/product-support/nokia-ovi-suite/howto?ccf_name=nokia-suite-3-2/guide...

If there is no update then please install your current firmware again and hopefully this should reinstall the certificates.

If it still doesn't work you can do a (factory reset) by Selecting Menu > Settings > Rest. factory sett. (or Reset device or Restore factory sett. or Rest. fact. sett.).
To reset only preference settings, but keep all personal data, such as contacts, messages and media file, select Restore settings only (or Restore sett. only or Settings only).
To reset all preference settings and delete all personal data, select Restore all (or All).
Enter the security code before the restore. If you have never changed your security code, then enter the default code 12345.

[nj15]

In addition to what jimmyireland has instructed, make sure the time and date settings of the phone are correctly set.

Good luck