# iPhone 4s, model A1431

> model of iPhone in the iPhone 4s series

**Wikidata**: [Q66816697](https://www.wikidata.org/wiki/Q66816697)  
**Source**: https://4ort.xyz/entity/iphone-4s-model-a1431

## Summary
iPhone 4s, model A1431 is a specific product model within the iPhone 4S series of smartphones produced by Apple Inc. This model number identifies a particular variant of the iPhone 4S, which was introduced in the United States on October 4, 2011.

## Key Facts
- iPhone 4s, model A1431 is a specific product model within the iPhone 4S series of smartphones
- The iPhone 4S series was produced by Apple Inc. and launched on October 4, 2011
- This model is classified as a product model with "iPhone 4S" as its subclass
- The model has a specific absorption rate of 1.18 watt per kilogram (head, 1g tissue)
- The model has a specific absorption rate of 1.19 watt per kilogram (body, 1g tissue)
- The model has a specific absorption rate of 0.99 watt per kilogram (head/body, 10g tissue)
- iPhone 4s, model A1431 originates from the United States
- The entity has 56 sitelinks across various knowledge bases

## FAQs
### Q: What is the model number of iPhone 4s?
A: The iPhone 4s model number is A1431.

### Q: When was the iPhone 4s model A1431 released?
A: The iPhone 4s was released on October 4, 2011, as part of the iPhone 4S series produced by Apple Inc.

### Q: What is the specific absorption rate of iPhone 4s model A1431?
A: The specific absorption rate varies depending on measurement conditions: 1.18 W/kg for head (1g tissue), 1.19 W/kg for body (1g tissue), and 0.99 W/kg for both head and body (10g tissue).

## Why It Matters
iPhone 4s, model A1431 represents a technical identifier within an important product line in smartphone history. While this specific entry focuses on model identification rather than full product impact, the iPhone 4S series introduced significant technological advancements that influenced mobile computing. This was the first iPhone to feature Siri, which transformed how users interacted with their phones. The device also improved upon the iPhone 4 with enhanced camera capabilities and processing power. Its technical documentation, including radio frequency exposure characteristics, demonstrates Apple's approach to balancing functionality with regulatory compliance, setting standards that influenced subsequent smartphone development.

## Notable For
- Technical identification as a specific model within the iPhone 4S product line
- Compliance with radio frequency exposure regulations with documented specific absorption rates
- Part of a series that introduced Siri technology to the iPhone ecosystem
- Manufactured by Apple Inc., a leading technology company in the smartphone industry
- Documentation of its physical and technical characteristics for regulatory purposes

## Body
### Product Identification
iPhone 4s, model A1431 is a specific product model identification within the broader iPhone 4S series. This alphanumeric code distinguishes it from other potential models or variants in the product line.

### Classification
- Entity type: Product model
- Superclass: iPhone 4S
- Manufacturer: Apple Inc.
- Country of origin: United States
- Introduction date: October 4, 2011

### Technical Specifications
The model has documented specific absorption rates as required by regulatory bodies:
- 1.18 watts per kilogram for head exposure (1g tissue measurement)
- 1.19 watts per kilogram for body exposure (1g tissue measurement)
- 0.99 watts per kilogram for head and body exposure (10g tissue measurement)

### Regulatory Compliance
The specific absorption rate measurements were conducted according to standard protocols:
- Head measurements follow specific absorption rate over 1g tissue as applicable to the head
- Body measurements follow specific absorption rate over 1g tissue as applicable to the body
- Both head and body measurements follow specific absorption rate over 10g tissue as applicable to respective body parts

### Documentation
The technical information for this model is documented across multiple knowledge platforms, with 56 sitelinks currently identified across various sources.

## References

1. [Source](https://support.apple.com/en-au/HT201296)
2. [Source](https://www.apple.com/legal/rfexposure/iphone4,1/en/)