I used my computer to check for updates for iPhone, to upgrade my partner's iPhone which has 16GB to which I swapped the memory card. My iPhone original number was first used to upgrade iPhone new applications. Then I registered my partner's number as well. When I tried to upgrade, everything was fine but it asked me to do the backup. I did, then asked me if I want to restore to original settings and I said yes, then it upgraded. When I checked, all data and photos were lost. I tried to find them in the files without a success. Can someone explain how can I recover all the data? I do not believe it is saved somewhere on the hard disc.