code: function smsDeletePhonesFromBlacklist(callback, phones) {
      if ((phones === undefined) || (!phones.length)) {
          return callback(returnError("Empty phones"));
      }
      var data = {
          'phones': JSON.stringify(phones),
      }
  
      sendRequest('sms/black_list', 'DELETE', data, true, callback);
  }
docs: Remove phones from blacklist
  
  @param callback
  @param phones