The "a1687" is a specific model number for the Apple iPhone 6s Plus. This model is often referred to as the "global" or "world" phone because it supports a wide range of cellular networks, including both GSM and CDMA carriers.
Understanding the a1687 Model
The a1687 is one of several model numbers released for the iPhone 6s Plus. Each model number corresponds to different cellular connectivity and is often tied to specific carriers or regions. The a1687, in particular, was designed to offer broad compatibility across various networks worldwide.
Key Features and Specifications of the a1687
The iPhone 6s Plus, including the a1687 model, boasts several key features and specifications:
- Processor: Powered by a 64-bit 1.8 GHz "Apple A9" processor with an embedded M9 motion coprocessor.
- RAM: 2 GB of LPDDR3 RAM.
- Storage: Available in 16 GB, 32 GB, 64 GB, or 128 GB of flash storage.
- Display: A 5.5-inch "Retina HD display with 3D Touch" with a 1920x1080 resolution at 401 ppi.
- Cameras: A 12-megapixel rear "iSight" camera with 1.22-micron pixels and an f/2.2 aperture, capable of 4K video recording. A 5-megapixel front "FaceTime HD" camera.
- Battery: A built-in rechargeable lithium-ion battery with a capacity of 2750 mAh.
- Operating System: Originally launched with iOS 9, with support for later versions.
- Connectivity: Supports Wi-Fi 802.11a/b/g/n/ac with MIMO, Bluetooth 4.2, and NFC.
Cellular Compatibility of the a1687
The primary distinction of the a1687 model lies in its extensive cellular band support. It is compatible with:
- LTE Bands: 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 27, 28, 29.
- TD-LTE Bands: 38, 39, 40, 41.
- TD-SCDMA: 1900 (F), 2000 (A).
- CDMA EV-DO Rev. A: 800, 1700/2100, 1900, 2100 MHz.
- UMTS/HSPA+/DC-HSDPA: 850, 900, 1700/2100, 1900, 2100 MHz.
- GSM/EDGE: 850, 900, 1800, 1900 MHz.
It's important to note that the a1687 model does not support LTE Band 30, which is used by AT&T in the US. This means while it will work on AT&T, it may not achieve the fastest LTE speeds in areas where Band 30 is heavily utilized. However, its broad compatibility makes it a suitable choice for use with Sprint, T-Mobile, and Verizon in the US, as well as many international carriers.
Differences Between iPhone 6s Plus Models
Apple released several models for the iPhone 6s Plus, each with slight variations in network compatibility. The main models include:
- A1634: This model is also a "world phone" and is compatible with AT&T and other GSM carriers in the US, as well as international carriers. It does support LTE Band 30.
- A1687: The "global" model, ideal for Sprint, T-Mobile, and Verizon, and international use, but lacks LTE Band 30 support.
- A1690/A1691: Mentioned in FCC documents but not widely discussed by Apple.
- A1699/A1700: Primarily sold in China and compatible with China Mobile, China Unicom, and China Telecom.
The key difference often boils down to support for LTE Band 30 (WCS or 2300 MHz). While AT&T utilizes this band for potentially faster speeds in certain areas, models like the a1687 are still fully functional on AT&T and other networks, albeit potentially with slightly reduced peak performance in those specific Band 30-dependent locations.
Why Model Number Matters
Understanding the model number, such as a1687, is crucial for several reasons:
- Carrier Compatibility: Ensures the phone will work with your chosen mobile carrier's network.
- International Roaming: For frequent travelers, a globally compatible model like the a1687 offers greater flexibility.
- Resale Value: Knowing the specific model can be important when selling the device.
How to Find Your iPhone Model Number
You can typically find your iPhone's model number in one of two places:
- On the device: Look on the back of your iPhone, near the bottom. It's usually in small print.
- In Settings: Go to Settings > General > About. Scroll down to "Model Number."
Frequently Asked Questions about the a1687
What carriers are compatible with the a1687 model?
The a1687 model is compatible with major US carriers like Sprint, T-Mobile, and Verizon. It also works with many international carriers.
Does the a1687 support LTE Band 30?
No, the a1687 model does not support LTE Band 30.
Is the a1687 unlocked?
The a1687 model is often sold as an unlocked "world phone," allowing it to be used with various carriers globally, especially when purchased at full price from carriers like Verizon or T-Mobile.
What are the differences between the iPhone 6s Plus models?
The primary differences between iPhone 6s Plus models (like the a1634 and a1687) lie in their support for specific LTE bands, most notably LTE Band 30.
Conclusion
The a1687 is a significant model number for the iPhone 6s Plus, recognized for its broad global cellular compatibility. Its ability to work across both GSM and CDMA networks makes it a versatile choice for users in the United States and abroad, though its lack of LTE Band 30 support means it may not perform optimally on AT&T in specific coverage areas. Understanding your iPhone's model number is key to ensuring seamless network connectivity and maximizing its functionality.
