Summarize the following:
The number is 1-800-UNITED-1 or 1-800-864-8331. Dial the number on your phone or through an app like Skype to access the airline’s automated customer service system. This number applies only to customers calling from the U.S. or Canada. If you use a telecommunication device for the deaf or teletypewriter, call 1-800-323-0170 instead. If you speak a language other than English, call customer service by using 1 of these numbers. Several languages are supported, including German, Spanish, and Mandarin. The hours of availability differ from number to number.  Find the number for your preferred language at https://www.united.com/web/en-US/content/contact/reservations/usandcanada.aspx. For instance, you can speak to customer service in Spanish by calling 1-800-426-5561. The hours of availability are listed underneath the numbers on United’s website. After you call, an automated voice will speak to you. The system will explain what words you need to say to navigate through it. Follow the instructions to address the reason that prompted you to call.  For example, you can say “Book a flight” to purchase a ticket. Say “Go back” to navigate back to the main menu. The automated voice will instruct you to recite any information it needs, such as your name and credit card number. If you prefer to type, use your phone's touchpad instead. Typing on your touchpad is an efficient way to get through the system if you know where you need to go. Different numbers lead to different customer service functions, such as flight status and baggage.  These shortcuts are listed at https://www.united.com/web/en-US/content/contact/reservations/usandcanada.aspx. For example, press 1 to check your flight status. Press 2 to book a flight and 3 to check an existing reservation. If you need help at any time, simply press 0 to connect to an operator. Once the United Airlines employee picks up the phone, explain to them what you need. They can answer any questions you have. The baggage resolution center can help with baggage delays, damaged items, and lost luggage. To skip the automated system, call the center’s direct phone number, which is 1-281-821-3526.  You can also call 1-800-335-2247 toll-free in the U.S. and Canada. If you are calling from Mexico, try 001-866-563-3244. For callers from other areas, use 800-33-55-2247.

Summary:
Call the toll-free service number if you are an English speaker. Use an alternative service number for more language options. Speak to the automated voice system. Type on your touchpad to get through the automated system faster. Press 0 to access an operator. Call the baggage tracking number to handle baggage issues.