Firstly please make sure you are under a workable and stable internet environment.
After downloading the game from Google Play Store, you will need to update another patch(about 240 MB) which will cost you several minutes, please make sure your device has enough storage.
If you failed to load the game during updating the patch or after updating the patch, please contact with our support team in game by clicking more>>FAQs to get assistance.
Information on the steps you took and screenshots or videos will help us to detect the problem, please provide as much information as you can.
Note: we recommend you use Android device which OS is above Android 6.0 and has more than 2GB RAM.
If the above answer can't help you solve the issue or didn't answer the question, you can reach our in-game customer service by clicking on "I NEED MORE HELP"