Tải về OTR App APK

1. Download the file OTR App.Mới nhất.apk.
2. On your Android phone, open the downloaded file OTR App.Mới nhất.apk.
3. Tap Install.
4. Follow the steps on the screen.

If you uninstall the old version before installing the new one, you will lose all your data. To preserve your data, never uninstall old versions. Just install the new version overriding it.

Please see this page to know how to fix common errors when downloading and using apps from this website.