So I finally reached 25 BAT on my smartphone and I thought I would share my experience.
The greyed out “Verify Wallet” button turned green with one click and the wallet was instantly verified with my Uphold account (I am logged in through the browser and the app).
This instantly created a new card in Uphold, which I recommend you change the default name “Brave Browser” to something that identifies the device; developers maybe you could have this be automatically?
However I notice that the new Brave Browser card showed empty, 0.00 BAT. I had expected it to show the 25 BAT that was required to verify. I returned to the Brave Browser app on my smartphone to check and in Rewards the 25 BAT still shows along with a new “Wallet Verified” status.
As an experiment I used Uphold to move 1 BAT to my new Brave Browser card. The process was fast and free and the new card in Uphold now showed 1 BAT. Meanwhile in the Brave Browser “app” the total had increased to 26 BAT, so it does indeed work however it appears you do not gain access to the 25 BAT accrued on your smartphone. There doesn’t seem to be anyway to withdraw it either despite the option appearing when you click on “Wallet Verified”.
That’s what I’ve learned so far.