Parse Server not working properly (Android 4.X)

In some situations, we noticed that our users had followed correctly our guide regarding installing the SDK to Android, whereas, we checked that some devices aren't creating the new installation.

We found out that on some of these devices, you need to force TLS v1.2 for Android 4.0+ because they aren't enabling this by default. You should paste the code below in the first line of your Android Application project.

try {
     ProviderInstaller.installIfNeeded(getApplicationContext());
     SSLContext sslContext;
     sslContext = SSLContext.getInstance("TLSv1.2");
     sslContext.init(null, null, null);
     sslContext.createSSLEngine();
} catch (GooglePlayServicesRepairableException | GooglePlayServicesNotAvailableException
 | NoSuchAlgorithmException | KeyManagementException e) {
     e.printStackTrace();
} 

Read more details about this on GitHub: GitHub - TLS v1.2 for Android 4.0 devices