how to send whatsapp apk file whatsapp – https://play.google.com/store/apps/details?id=com.whatsapp&hl=en App backup – https://play.google.com/store/apps/details?id=mobi.usage.appbackup&hl=en file manager – https://play.google.com/store/apps/details?id=com.asus.filemanager&hl=en LINK RAHUL GUPTA