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From Moz 2.0 the only way is to get LOW SPAM SCORE backlinks from HIGH AUTHORITY websites.
It's just simple as that. But it requires a lot of work (i hate making backlinks lol) but the good thing is that i found this guys -> Increase DA from 0 to 50+ in 15 days.
I attached my screenshot boost. Hope it helps! 
Good question, actually that's easy to do! You have to get lots of links from high quality websites with low spam score. There are some guys that offer a service that can help you out increase DA in 14 days or just add Alex on skype at:an71qu3
They did a great job for my website so why not recommend them lol
Hope it helps Aspirant
