Update: It’s being reported that this unfortunately may only work if you’re using Android Pay for your purchase.
While Uber often has promotions for new users, it’s rare to see promotions for existing users. Existing users can get $10 off their next Uber ride by using promotion code ANDROIDPAY. Just open the Uber app, click the menu button at the top left, and click on the “Promotions” section. That’s where you’ll enter the promotion code.
The promotion code will immediately be reflected in your account, and as you’ll see, it’s valid through May 31, 2016, so you have a bit over two weeks to use it.
For what it’s worth, despite the name of the promotion code, I had no issues using it for my iPhone.
(Tip of the hat to The Forward Cabin)