Megallan GPS Purchase Restrictions 1. Limit of $50 savings per item purchased. 2. AAA data updates coming soon. Data may not be made available in all areas. Updates will be provided for the standard life of personal navigation device warranty. 3. If you’re in need of AAA’s roadside assistance, the Magellan device provides you with the AAA phone number to call and the location data for you to provide to the AAA member service representative.