As there are hundreds of different Android phone models and manufacturers customize the Android software most of the time, there might be certain models facing difficulties running Valiant Force.
Here are some quick and simple fixes you can try.
Fix 1: Restart your WIFI router/ modem and make sure your connection is stable.
Fix 2: Install the game in your phone memory, not your phone's SD card memory
Fix 3: Uninstall the game, remove SD card, restart phone, install in phone memory, slot back the SD card
Fix 4: Simply restart your phone
If you are still unable to enter the game, please send us a private message on the Facebook page with the following items:
1. Screenshot of the error
2. Your phone model
3. Android version
4. Company name of WIFI or connection provider