It is important that your internet is stable to avoid failing your battles. For a smooth experience, it's important that you are connected to a reliable network, and that your device's signal is strong.
Full WiFi bars or mobile (cellular) data coverage alone is not always enough to guarantee a solid connection, as local networks can slow down, getting overburdened at times. This is especially true if you play in a moving vehicle or on underground public transport. As with any other online service, we recommend playing over WiFi with a dependable internet service provider, or at least a solid 3G/LTE/5G connection with a reliable carrier.
Please refer to the details below if the issue persists.
1) Check whether you have a good Internet connection (3G, LTE, 5G, Wi-fi).
2) Delete unnecessary apps or data (pictures, videos) to secure enough memory.
3) Close background running apps to secure device memory and restart the game.
4) Restart your device.
5) Try to adjust graphic resolutions via [Settings].
If the connection issue persists even after trying as above, please send an inquiry to customer service.