This is my procedure, EVERYTIME I want to login:
1- Delete the game from my device
2- Restart Device
3- Download Modern War from APP Store
4- Load game

This is about 5 minutes of solid time to get this to work and if the screen times out at all, I have to start it all over. I'm not quite sure why I'm still putting up with it, but probably because I'm a team guy and my faction needs my support.