Hi, I have an Iphone 4 and I never had a back up before.. Today, as I wanted to make one , i connect the Iphone with my laptop (not Mac) ITunes. On this computer i had also an another apple id account (not mines it was for an another iphone) (on the past). So, i signed in with my apple account , and i make a sync. When the sych was over, I wanted to make a back up.. And accidentally the back up was from the other apple id address (and iphone) and all my contacts dissappear and i see contacts and apps from the other iphone . .... I called a technician and told me to make a restore.. And then everything dissapeared.. when i import ''the sim contacts'' i saw contacts from the other iphone.. please give a little help.. i dont know what to do all my contacts are gone!