Hi. I tried it. I think i couldn't backup my contacts, which WERE on my phone. And that's not the only problem. Let me start from the beginning...
I downloaded, used it to backup my apps, I saw it was successful, so I used it to backup my contacts. Then I changed my ROM, from jpu to jpy (best, by the way). I tried to download mybackup root, but it didn't load, said it could be installed only on 1 device. Weird, this phone is my only phone... So i had to download mybackup trial. It could restore my apps successfully, like I never wiped data and flashed a new rom. Very successful on that. But when it came to my contacts, it seems it never backed my contacts(the ones on the phone) up or it just couldn't restore them. I saw that some of my contacts were on google, and mybackup root backed them up, it restored them. Now i have duplicates of all. I said delete when notification popped up(you deleted too many contacts it said, and i chose delete them).
Now what?