code: private Integer sendSMS(Integer msgId, Integer senderId, 
                   String[] smsPhones, String labelAccount, String msgContent, 
                   Application app) throws InsufficientQuotaException {
  		sendSms.mayCreateAccountAndCheckQuotaOk(smsPhones.length, labelAccount, app);
  		return sendSms.sendSMS(msgId, senderId, smsPhones, labelAccount, msgContent, app);
  	}
docs: Since SendSms.sendSMS silently fail,
  and since we do not want to modify SOAP, we behave differently in REST: we do check first.