A1821
- Earliest Firmware
- iPadOS 10.3.2
- June 5, 2017
- Latest Firmware
- iPadOS 17.7.11
- May 11, 2026
- Total Firmware
- 114 releases
- Support Span
- 8 years 11 months
The model number A1821 belongs to the iPad Pro 2 (12.9-inch, Cellular) (device identifier iPad7,2). Apple assigns multiple model numbers to each device for regional and connectivity variants, so one device usually carries several of them.
How do I find the model number on my device?
Open Settings > General > About and read the Model Number field. The number is also printed in the fine print on the back of the device and, on some models, on the SIM tray. Our model identification guide walks through every method.
What is the difference between A1671 and A1821?
Nothing software-related. These model numbers all refer to the same iPad Pro 2 (12.9-inch, Cellular); Apple uses them for regional and connectivity variants, and firmware support is identical across all of them.