Android: CellInfo gives me the same value for CID, MNC, MCC, LAC and signal strength

Question

I'm trying to get the information of the cell tower connected to the phone in the Android studio. This is my code:

    telephonyManager = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);

    List<CellInfo> cellInfos = telephonyManager.getAllCellInfo();
    for (CellInfo cellInfo:cellInfos){
        if (cellInfo instanceof CellInfoGsm){
            textViewCellular.append("\n\nType: GSM");
            textViewCellular.append("\nCell Identity:\n\tCID:" + ((CellInfoGsm) cellInfo).getCellIdentity().getCid());
            textViewCellular.append("\n\tLAC:" + ((CellInfoGsm) cellInfo).getCellIdentity().getLac());
            textViewCellular.append("\n\tMCC:" + ((CellInfoGsm) cellInfo).getCellIdentity().getMcc());
            textViewCellular.append("\n\tMNC:" + ((CellInfoGsm) cellInfo).getCellIdentity().getMnc());
            textViewCellular.append("\nSignal Strength:" + ((CellInfoGsm) cellInfo).getCellSignalStrength().getDbm() + "dBm");
        }
    }

But, running the code on my mobile gives me the same value: CID = LAC = MCC = MNC = Signal strength = 2147483647 Is there any explanation for this?

This problem happens for me too . I am very curious why this happens — ofskyMohsen, Oct 19 '17 at 07:41
`2147483647` is the maximum value for a variable of type int. In your case, it simply means the cell info values are unknown. — Srikar Reddy, Jan 19 '18 at 08:24

Android: CellInfo gives me the same value for CID, MNC, MCC, LAC and signal strength

0 Answers0