2.5mb https://play.google.com/store/apps/details?id=app.fastfacebook.com
3.5mb https://play.google.com/store/apps/details?id=com.radiantbits.atrium
messengers
5mb https://play.google.com/store/apps/details?id=com.spartancoders.gtok
10mb https://play.google.com/store/apps/details?id=com.facebook.orca
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