I see a lot of people asking about mobile grants, wallets and how to get their funds off mobile. I'll admit I was confused at first too. I couldn't find any answers to the questions I was seeking so I hope this helps.
They just released a batch of 100,000 android grants on april 17th.
After reading their latest Brave press release my mind was put to ease. As I imagine there is a lot of data to gather and coding left to test.
I’d recommend checking that press release every few days.
Hope this helps.