I would be really careful at this stage, but I'm willing to give this a chance.

I have proposed them with a thorough review here at the forum.

Let's see if I'm able to buy a demo unit.  

I discovered mining site yesterday "https://genbtc.com/" . If this is a legit site for mining it is possible to mine bitcoin in our phone. Bitcoin will be generated depending on the of how much bitcoin you set. Is anyone knows if this site is legit ? Thank you!

But in the other legit site I knew, it is impossible to use our phone in mining. Just use your desktop but be sure that it is a high-end computer