How to get Telephone Number In Android -

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i want telephone number. used sample code..

telephonymanager tm = (telephonymanager)getsystemservice(telephony_service); string strphonenumber = tm.getline1number();

and used permission- read_phone_state.

but returning null.

you able number cdma device.

public string returnnumber() {      string number = null;      string service = context.telephony_service;      telephonymanager tel_manager = (telephonymanager) getsystemservice(service);      int device_type = tel_manager.getphonetype();       switch (device_type) {            case (telephonymanager.phone_type_cdma):               number = tel_manager.getline1number();            break;            default:              //return else              number = "no number";             break;      }      return number; }

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