A. For Facebook-Login you just need to remove your Facebook App or use FBLite.
B. You want to login with Google+ or Facebook-App (installed)?
1. Your device needs root! If you don't know what root is, your device is not rooted =D
2. You have to unsign APK (sometimes unsigned APKs are uploaded too, then you can skip this)
3. You must install original game and login with Google+ or FB (don't remove game after!)
4. You have to install the Apps: Lucky Patcher and BusyBox.
5. You have to patch the signature verification
6. You install the modded APK over the original game
7. Thats it =)
Sounds easy, but needs one time watched live to understand. So watch video and enjoy =)
BusyBox Pro v54.apk - 3.8 MB
Latest Luckypatcher version
1. Many devices don't need BusyBox to patch with Luckypatcher like NOX! So you can skip the BusyBox part and proceed directly with Luckpatcher =)
2. If you download Luckypatcher from the official page it will be an .zip file and not an .apk file. Please unzip it before your install.