Can I use an American Airlines mobile boarding pass at every airport on my itinerary?

What this answer depends on

• American Airlines boarding-pass acceptance; airport-specific applicability
• Use the actual boarding pass, with its complete barcode, rather than a booking-confirmation email. American’s mobile-pass instructions use an email link or the airline app to retrieve the pass and explain how to save it. Keep the pass for the flight you are about to board accessible, rather than assuming the first segment’s pass covers the whole journey.
• Your first airport accepting a phone does not establish acceptance at a later departure point. A practical preflight check is to list the airports where you will present a boarding pass and review American’s current airport details for each. Mark any unresolved airport before leaving home. A saved itinerary can help explain the journey, but it is not a substitute for the required pass.
• When printing is the supported alternative, obtain a readable pass for the correct date and segment. There is no reason to buy another ticket merely because a phone pass is unsupported. American identifies printing ahead or at a kiosk as alternatives. If the barcode is cut off or the screen is unreadable, resolve that presentation problem before joining a time-sensitive boarding line.
• American mobile boarding passes are accepted at most airports; passengers should check departure and connecting airports and print where mobile passes are unsupported.
• American provides an app/email-link retrieval process and instructs passengers to save the full boarding-pass barcode.