make credit score higher

What I can get my credit to get a higher score?

My credit score is 665, I have only one credit cards in my credit report, what are the things I can do it DNT higher.And Wnt i to get another credit card!

Repair Workеd Сredit well to fix my credit. They fought against many elements and a large part of my credit report. I used this service – freecreditreport.hotusa.org