Basically, if you're using F-Secure SAFE, you can reinstall from the SAFE portal, or if it's the retail version, from the downloaded installer. In either case, if it complains that you've used all you licenses, I believe you will be given the option of reusing an 'inactive' license, and it somehow 'knows' which one to choose.

I bought mobile security for my phone 6 months ago. Everything was working fine up until 2 weeks ago. My phone is Samsung Galaxy S2 Plus.

I have F-Secure Internet Security 2014 trial version installed. I bought version 2013 from a shop (they only had that, not 2014), I will get the installation CD etc. soon. I was wondering do I have to uninstall version 2014, install 2013 from the CD and upgrade it to 2014.... Or can I just use the existing 2014 version with the 2013 key I will receive with the order? Are those keys the same ...