Always use a reliable Wi-Fi connection rather than 3G or 4G, if you have the option.

Even if you have good signal strength showing for your Wi-Fi connection, it's possible that your bandwidth may be limited.

If the network is congested - for example, if there are many other users sharing the network or bandwidth-intensive activities are happening (such as streaming video) you may experience lag.

There are free bandwidth tests you can run through your device's web browser, with no need to download any software. You should have at least 10Mb download and 3Mb upload for the game to run properly.

Here are some additional steps to try:
  • Try disconnecting and reconnecting to your WiFi in your device's settings.
  • Try again using a different Wi-Fi network (a café, library, school, friend’s home, or wherever it’s the strongest) for comparison.