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I am building an android application where I need a value of "getSimOperator".
I am able to get this value > 21 API version but for the lower version in dual SIM. I am getting a value of SIM1 but not able to get SIM2 value.
How can I get "getSimOperator" value of SIM2 < 21 API version.
I earlier posted a question below is the link
How to get Mcc and Mnc below LOLLIPOP_MR1.
Someone has referred me a link dual sim android phone which sim receive a call.
But I am getting an error while implementing the code of above link. I had listed down the error "java.lang.NoSuchMethodException: getDefault [int]"
Cloud anyone explains me why this error is coming.

here this link will might help you and refer the example no. 24 in this example http://www.programcreek.com/java-api-examples/android.telephony.TelephonyManager
Try this Github link.
https://github.com/illarionov/MozStumbler/blob/develop/src/org/mozilla/mozstumbler/cellscanner/GeminiCellScanner.java
In this following method return all info for available simcard.
private List<CellInfo> getCellInfo(int presentSimNumsIndex){}
Another method is also which is as below.
For API >=17:
TelephonyManager manager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
// Get information about all radio modules on device board
// and check what you need by calling #getCellIdentity.
final List<CellInfo> allCellInfo = manager.getAllCellInfo();
for (CellInfo cellInfo : allCellInfo) {
if (cellInfo instanceof CellInfoGsm) {
CellIdentityGsm cellIdentity = ((CellInfoGsm) cellInfo).getCellIdentity();
//TODO Use cellIdentity to check MCC/MNC code, for instance.
} else if (cellInfo instanceof CellInfoWcdma) {
CellIdentityWcdma cellIdentity = ((CellInfoWcdma) cellInfo).getCellIdentity();
} else if (cellInfo instanceof CellInfoLte) {
CellIdentityLte cellIdentity = ((CellInfoLte) cellInfo).getCellIdentity();
} else if (cellInfo instanceof CellInfoCdma) {
CellIdentityCdma cellIdentity = ((CellInfoCdma) cellInfo).getCellIdentity();
}
}
In AndroidManifest add permission:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
</manifest>
To get network operator you can check mcc and mnc codes:
https://en.wikipedia.org/wiki/Mobile_country_code
https://clients.txtnation.com/hc/en-us/articles/218719768-MCCMNC-mobile-country-code-and-mobile-network-code-list-