code: function smsGetCampaignInfo(callback, campaign_id){
      if (campaign_id === undefined) {
          return callback(returnError("Empty sms campaign id"));
      }
  
      sendRequest('sms/campaigns/info/' + campaign_id, 'GET', {}, true, callback);
  }
docs: Get information about sms campaign
  
  @param callback
  @param campaign_id