A is an unofficial Android application that attempts to interface with your phone’s radio/modem to send TCAP messages directly, bypassing the standard USSD or SIM toolkit interface.
+---------------------------------------------+ | Robi Network Tower | +---------------------------------------------+ ^ | Signaling Data v +---------------------------------------------+ | Android Device | | +---------------------------------------+ | | | TCAP APK Diagnostic Interface | | | +---------------------------------------+ | +---------------------------------------------+ tcap apk robi