直接上代码：

	/**
	 * 获取SIM卡运营商
	 * 
	 * @param context
	 * @return
	 */
	public static String getOperators(Context context) {
		TelephonyManager tm = (TelephonyManager) context
				.getSystemService(Context.TELEPHONY_SERVICE);
		String operator = null;
		String IMSI = tm.getSubscriberId();
		if (IMSI == null || IMSI.equals("")) {
			return operator;
		}
		if (IMSI.startsWith("46000") || IMSI.startsWith("46002")) {
			operator = "中国移动";
		} else if (IMSI.startsWith("46001")) {
			operator = "中国联通";
		} else if (IMSI.startsWith("46003")) {
			operator = "中国电信";
		}
		return operator;
	}

Android 获取手机SIM卡运营商