Bullet Strike requires stable Internet connection. 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 solid connection, as local networks can slow down, getting overburdened at times. This is especially true if you play in a moving vehicle. As with any other online service, we recommend playing over WiFi with a dependable Internet service provider, or at least a solid 3G/4G connection with a reliable carrier.