1Uninstall the old Nexus app first (new signature — it won't install over the old one)
2Tap Download APK above, open the file, and allow "Install unknown apps" when asked
3Open the app and grant SMS and Notification access when prompted
4Scan the pairing code from the back office, then wait for admin approval
★Keep it running
Phones kill background apps and silently stop forwarding. In the app open Mine → User guide — it auto-selects your phone brand (OPPO / vivo / Samsung / Xiaomi / Pixel) and shows the exact auto-start & battery settings to turn on. Available in 6 languages.
This app runs on the SIM / receipt phones that receive the payment SMS, to forward them and their OTP codes to the back office. It is an internal tool — install it only on those phones, not on anyone's personal phone.