Apple Care

See the following (applicable in the US) from AppleCare Products - iPhone - Apple

How to buy

1. Purchase either AppleCare+ product with your new iPhone.
2. Or buy it within 60 days of your iPhone purchase:

• • On your device (go to Settings > General > About and choose AppleCare+ Coverage Available)
  • Online (requires you to verify your serial number and run a remote diagnostic)
  • At an Apple Store (inspection of iPhone and proof of purchase are required)
  • By calling 800-275-2273 (requires you to run a remote diagnostic and provide proof of purchase)

Thanks for this.

I have this same question, but it applies to a brand new 2019 13 inch Mac Book Pro

Can I assume that the same thing applies?

I should still be able to buy AppleCare+ even though I am not purchasing the Pro from the Apple Store?

Also do you know if I can take my new Pro to the Apple Store at a later time and upgrade the RAM from 8GB to 16GB?

Thanks in advance

You can purchase AppleCare it directly from the Authorized Reseller at the same time as you buy the MacBook Pro or within 60 days. See: https://www.apple.com/support/products/mac/

RAM cannot be upgraded after purchase.