Android : How to delete contacts from sim in android

I did following code for deleting selected contacts from sim card. but its not deleting and also not throwing any error.

protected void DeleteContacts(ArrayList<String> ids){


        int flg = 0;

        String[] strids = new String[ids.size()];
        strids = ids.toArray(strids);

        for(int i=0;i<strids.length;i++){

            Cursor sims = getActivity().getContentResolver().query(
                    Uri.parse("content://icc/adn"), null,
                    "_id=?", new String[]{strids[i]}, null);


            sims.moveToFirst();
            if(sims.getCount()>0){
                String phoneNumber = sims.getString(sims.getColumnIndex("number"));
                boolean val = deleteContact(phoneNumber);

                if(!val)
                    flg=1;
            }

            if(flg==0)
                Toast.makeText(getActivity(), "Contact Deleted", Toast.LENGTH_SHORT).show();
            sims.close();

        }

    }

    public boolean deleteContact(String phone) {
        Cursor cur = getActivity().getContentResolver().query(Uri.parse("content://icc/adn"), null, "number=?", new String[]{phone}, null);
        try {
            if (cur.moveToFirst()) {
                do {
                        String lookupKey = cur.getString(cur.getColumnIndex(ContactsContract.Contacts.LOOKUP_KEY));
                        Uri uri = Uri.withAppendedPath(ContactsContract.Contacts.CONTENT_LOOKUP_URI, lookupKey);
                        getActivity().getContentResolver().delete(uri, null, null);
                        return true;
                } while (cur.moveToNext());
            }

        } catch (Exception e) {
            System.out.println(e.getStackTrace());
        }
        return false;
    }