HushSMS is an Android app historically used for sending various specialized SMS/USSD message types (e.g., empty SMS, WAP Push, ping, flash SMS, CB messages) often employed for testing, device probing, or triggering specific network/services behaviors. Version referenced: "278" (assumed build 2.7.8 or build 278). Distribution commonly occurs via third-party APK sites.
Using the app to send silent pings to locate or track a user without consent violates privacy laws in many jurisdictions. hushsms 278 apk download best