How to install APK / APKS / OBB file on Android
Hi, There you can download APK file "Gateway" for vivo X21 free, apk file version is 2.0.12 to download to your vivo X21 just click this button. It's easy and warranty. We provide only original apk files. If any of materials on this site violates your rights, report us
Just download application «R4S Gateway» on your smartphone (or tablet), that you use at home only.
Please pay attention:
That smartphone or tablet should be placed in Bluetooth zone, around 10 meters from accessories with «R4S» logo.
Application «R4S Gateway» works only with smartphone, that has installed application «Ready For Sky»