Thanks for your support to Flash products.
For Pokemon Go, as we know, it needs AR to support the function, which means the phone is equipped with Gyroscope and Accelerometer at the same time, to make sure it functions at its best.
And for Flash 2, the sensors are G-sensor(Gravity sensor), Accelerometer, Proximity & light sensor. With Accelerometer only, sometimes you may find playing Pokemon Go is not performing so satisfying.
And for battery, maybe you could have a self-test like checking battery usage history and turning down some back-stage running software and then check the temp again. Thank you.
For any further question, please feel free to contact us or come to our service center with proof of purchase (invoice, receipt, warranty card, etc). Thank you.