There's a silly Easter egg in the Nougat build of oxygen OS, instructions.
1. Open calculator
2. Enter "1+" and hit equals
3. Be glad it's not flappy bird
4. Close the calculator, feeling slightly amused but overall dissatisfied
5. Have a cup of tea, and maybe a piece of cheese on toast
6. Go about the rest of your day
1. Open calculator
2. Enter "1+" and hit equals
3. Be glad it's not flappy bird
4. Close the calculator, feeling slightly amused but overall dissatisfied
5. Have a cup of tea, and maybe a piece of cheese on toast
6. Go about the rest of your day