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The Fairphone 4 was announced on September 30, 2021, and became available for customers to order on October 25, 2021.
Answer: True
Explanation: The Fairphone 4 was officially announced on September 30, 2021, with pre-orders opening on October 25, 2021, marking its official launch period.
The Fairphone 4 was sold continuously from its release date until December 2025, after which sales ceased.
Answer: False
Explanation: The Fairphone 4 was available for purchase from October 25, 2021, until December 2024. Sales ceased in December 2024, not 2025.
A total of 192,056 units of the Fairphone 4 were sold during its production run.
Answer: True
Explanation: During its production run, a total of 192,056 units of the Fairphone 4 were sold.
The Fairphone 4 is the direct successor to the Fairphone 2 and was later succeeded by the Fairphone 5.
Answer: False
Explanation: The Fairphone 4 succeeded the Fairphone 3+, not the Fairphone 2. It was subsequently succeeded by the Fairphone 5.
Key improvements of the Fairphone 4 over the Fairphone 3+ include 5G support, a better selfie camera, and IP54 dust and splash protection.
Answer: True
Explanation: Key advancements in the Fairphone 4 compared to its predecessor, the Fairphone 3+, encompass the integration of 5G network capabilities, an upgraded selfie camera, and enhanced durability through IP54 dust and splash protection, among other significant improvements.
Fairphone ceased production and sales of the Fairphone 4 in December 2024.
Answer: True
Explanation: Fairphone concluded the production and sales period for the Fairphone 4 in December 2024, marking the end of its commercial availability as a new device.
What is the Fairphone 4 and what is its significance in the Fairphone product line?
Answer: A smartphone emphasizing ethical production and repairability, succeeding the Fairphone 3+.
Explanation: The Fairphone 4 represents a significant iteration in Fairphone's product line, distinguished by its focus on ethical production, repairability, and sustainability. As the successor to the Fairphone 3+, it embodies the company's mission to create more responsible consumer electronics.
When was the Fairphone 4 officially announced?
Answer: September 30, 2021
Explanation: The Fairphone 4 was officially announced on September 30, 2021.
For how long was the Fairphone 4 available for purchase?
Answer: From October 2021 until December 2024
Explanation: The Fairphone 4 was available for purchase from October 25, 2021, until December 2024.
Which model directly preceded the Fairphone 4 in the product lineup?
Answer: Fairphone 3+
Explanation: The Fairphone 3+ directly preceded the Fairphone 4 in the Fairphone product lineup.
Compared to the Fairphone 3+, what was a key hardware improvement in the Fairphone 4?
Answer: Introduction of optical image stabilization (OIS) in the main camera
Explanation: A significant hardware enhancement in the Fairphone 4 compared to the Fairphone 3+ was the introduction of optical image stabilization (OIS) in its main rear camera system, contributing to improved photo and video quality.
The Fairphone 4 measures approximately 6.38 inches in height and weighs 225 grams.
Answer: True
Explanation: The Fairphone 4 measures 162 mm in height (approximately 6.38 inches), 75.5 mm in width, and 10.5 mm in thickness, with a weight of 225 grams.
The Fairphone 4 is powered by the Qualcomm Snapdragon 750G chipset, providing efficient performance.
Answer: True
Explanation: The Fairphone 4 utilizes the Qualcomm Snapdragon 750G system-on-chip, which is engineered to deliver a balance of performance and power efficiency, supporting advanced features such as 5G connectivity.
The Fairphone 4 is available in configurations with 6 GB or 8 GB of RAM and 128 GB or 256 GB of internal storage.
Answer: True
Explanation: The Fairphone 4 is available in configurations offering 6 GB or 8 GB of RAM, coupled with internal storage options of 128 GB or 256 GB.
The Fairphone 4 supports expandable storage via Micro SD cards up to 2 TB.
Answer: True
Explanation: The Fairphone 4 supports expandable storage through a Micro SD card slot, accommodating capacities of up to 2 TB, thereby offering significant flexibility for users requiring additional data storage.
The Fairphone 4 supports both a physical Nano SIM card and an eSIM for dual-SIM functionality.
Answer: True
Explanation: The Fairphone 4 supports dual-SIM functionality through the inclusion of both a physical Nano SIM card slot and eSIM (embedded SIM) capability.
What were the physical dimensions of the Fairphone 4?
Answer: 162 mm height, 75.5 mm width, 10.5 mm thickness
Explanation: The Fairphone 4 measures 162 mm in height, 75.5 mm in width, and 10.5 mm in thickness.
What is the specific chipset powering the Fairphone 4?
Answer: Qualcomm Snapdragon 750G
Explanation: The Fairphone 4 is powered by the Qualcomm Snapdragon 750G system-on-chip.
What are the maximum RAM and storage options available for the Fairphone 4?
Answer: 8 GB RAM / 256 GB Storage
Explanation: The Fairphone 4 is available in configurations offering 6 GB or 8 GB of RAM, coupled with internal storage options of 128 GB or 256 GB.
What is the maximum capacity of a Micro SD card supported by the Fairphone 4?
Answer: 2 TB
Explanation: The Fairphone 4 supports expandable storage via Micro SD cards with a maximum capacity of 2 TB.
Besides a physical SIM, what other SIM technology does the Fairphone 4 support?
Answer: eSIM
Explanation: In addition to supporting a physical Nano SIM card, the Fairphone 4 also supports eSIM (embedded SIM) technology.
The rear camera system of the Fairphone 4 includes a 48-megapixel wide lens with OIS, a 48-megapixel ultrawide lens, and a depth sensor.
Answer: True
Explanation: The Fairphone 4's rear camera array comprises a 48-megapixel wide-angle lens featuring Optical Image Stabilization (OIS), a secondary 48-megapixel ultrawide lens, and a Time-of-Flight (TOF) 3D depth sensor, enabling advanced photographic capabilities.
The front-facing camera on the Fairphone 4 has a resolution of 25 megapixels.
Answer: True
Explanation: The Fairphone 4 is equipped with a 25-megapixel front-facing camera, designed for high-resolution selfies and video conferencing.
The Fairphone 4 features a 6.3-inch IPS LCD display with a resolution of 1080 x 2340 pixels.
Answer: True
Explanation: The Fairphone 4 is equipped with a 6.3-inch IPS LCD display, offering a resolution of 1080 x 2340 pixels, which provides a sharp and vibrant visual experience.
The Fairphone 4 uses a USB-C 3.0 port that supports DisplayPort for video output.
Answer: True
Explanation: The Fairphone 4 features a USB-C 3.0 port that not only facilitates charging and data transfer but also supports DisplayPort output, enabling connection to external displays.
The Fairphone 4 supports GPS, GLONASS, BeiDou, and Galileo for navigation.
Answer: True
Explanation: The Fairphone 4 offers comprehensive navigation capabilities through its support for multiple GNSS constellations, including GPS, GLONASS, BeiDou, and Galileo, enhancing location accuracy and reliability.
The Fairphone 4's display has a pixel density of approximately 409 pixels per inch (ppi).
Answer: True
Explanation: The Fairphone 4's 6.3-inch display boasts a pixel density of approximately 409 pixels per inch (ppi), contributing to sharp text rendering and detailed image reproduction.
The TOF 3D sensor in the Fairphone 4's rear camera system functions as a depth sensor, aiding in autofocus accuracy and portrait effects.
Answer: True
Explanation: The Time-of-Flight (TOF) 3D sensor integrated into the Fairphone 4's rear camera system serves as a depth sensor, primarily utilized to enhance autofocus precision and facilitate sophisticated portrait modes with background blur effects, rather than for selfie enhancement.
Which of the following is NOT part of the Fairphone 4's triple rear camera setup?
Answer: 12-megapixel telephoto lens
Explanation: The Fairphone 4's rear camera system includes a 48MP wide lens with OIS, a 48MP ultrawide lens, and a TOF 3D depth sensor. It does not feature a 12-megapixel telephoto lens.
What is the resolution of the Fairphone 4's front-facing camera?
Answer: 25 MP
Explanation: The front-facing camera on the Fairphone 4 has a resolution of 25 megapixels.
What is the pixel density (ppi) of the Fairphone 4's 6.3-inch display?
Answer: 409 ppi
Explanation: The Fairphone 4's 6.3-inch display boasts a pixel density of approximately 409 pixels per inch (ppi), contributing to sharp text rendering and detailed image reproduction.
Which feature does the Fairphone 4's USB-C 3.0 port support besides data transfer and charging?
Answer: DisplayPort output
Explanation: Beyond data transfer and charging, the Fairphone 4's USB-C 3.0 port supports DisplayPort output for video connectivity and USB On-The-Go (OTG) functionality.
The Fairphone 4 supports which combination of satellite navigation systems?
Answer: GPS, GLONASS, BeiDou, Galileo
Explanation: The Fairphone 4 supports a comprehensive suite of satellite navigation systems, including GPS, GLONASS, BeiDou, and Galileo, leveraging dual-band GNSS for enhanced accuracy.
What functionality does the Fairphone 4's USB-C port offer via DisplayPort support?
Answer: Connection to external monitors for video output
Explanation: Via DisplayPort support, the Fairphone 4's USB-C port enables users to connect the device to external monitors or displays, facilitating a larger viewing experience.
What does OIS stand for in the context of the Fairphone 4's rear camera?
Answer: Optical Image Stabilization
Explanation: OIS in the context of the Fairphone 4's rear camera stands for Optical Image Stabilization, a technology that mitigates hand movements to produce sharper photographs and steadier videos.
What does the dual-band GNSS support in the Fairphone 4 improve?
Answer: Accuracy and reliability of location tracking
Explanation: Dual-band GNSS support in the Fairphone 4 enhances the accuracy, speed of acquisition, and overall reliability of location tracking, particularly in environments where satellite signals may be obstructed.
The Fairphone 4 features a standard bar or slate form factor, typical of most modern smartphones.
Answer: True
Explanation: The Fairphone 4 utilizes a slate form factor, which is the standard design paradigm for contemporary smartphones, characterized by a single, integrated touchscreen interface.
The Fairphone 4 is equipped with a 3905 mAh battery that supports 20W fast charging.
Answer: True
Explanation: The Fairphone 4 features a 3905 mAh battery and supports 20W fast charging, enabling quicker replenishment of power.
The Fairphone 4 meets MIL810G certification standards for durability.
Answer: True
Explanation: The Fairphone 4 has achieved MIL810G certification, signifying that it has successfully passed rigorous durability tests, demonstrating its reliability and resilience under a variety of challenging environmental conditions.
What is the battery capacity of the Fairphone 4?
Answer: 3905 mAh
Explanation: The Fairphone 4 is equipped with a 3905 mAh battery.
What is the charging speed supported by the Fairphone 4?
Answer: 20W fast charging
Explanation: The Fairphone 4 supports 20W fast charging.
What does the MIL810G certification indicate about the Fairphone 4?
Answer: It has passed rigorous tests for durability under various environmental conditions.
Explanation: The MIL810G certification indicates that the Fairphone 4 has successfully passed rigorous durability tests, demonstrating its reliability and resilience under a variety of challenging environmental conditions.
The Fairphone 4 incorporates recycled plastics and also utilizes recycled metals such as tin and rare earth minerals.
Answer: True
Explanation: The Fairphone 4's construction integrates recycled plastics alongside recycled metals, including tin and rare earth minerals, reflecting Fairphone's commitment to reducing reliance on virgin resources and minimizing environmental impact.
The Fairphone 4's modular design consists of seven distinct user-replaceable modules.
Answer: True
Explanation: The Fairphone 4 features a sophisticated modular design comprising seven distinct user-replaceable modules, which significantly enhances its repairability and extends its operational lifespan.
Which of the following materials is used in the Fairphone 4 and is certified by the Aluminium Stewardship Initiative (ASI)?
Answer: Aluminum
Explanation: Aluminum, sourced from suppliers certified by the Aluminium Stewardship Initiative (ASI), is among the responsibly sourced materials utilized in the construction of the Fairphone 4.
How many distinct modules make up the Fairphone 4's modular design?
Answer: 7
Explanation: The Fairphone 4's modular design is comprised of seven distinct modules, facilitating user repair and component replacement.
How long is Fairphone guaranteed to provide spare parts for the Fairphone 4 after its sales period ends?
Answer: Until at least 2028
Explanation: Fairphone guarantees the availability of spare parts for the Fairphone 4 until at least 2028, ensuring that owners can procure necessary components for repairs well beyond the device's end-of-sale date.
What is the primary objective of Fairphone's business model, as exemplified by the Fairphone 4?
Answer: To create more sustainable and ethical electronics by focusing on fair labor, responsible sourcing, and longevity.
Explanation: The primary objective of Fairphone's business model, exemplified by the Fairphone 4, is to pioneer more sustainable and ethical electronics through fair labor practices, responsible material sourcing, extended product lifespans via modularity and repairability, and comprehensive long-term software support.
Why is the Fairphone 4's modular design significant for its sustainability?
Answer: It facilitates repairs and extends the device's usable lifespan, reducing e-waste.
Explanation: The Fairphone 4's modular design significantly contributes to its sustainability by enabling straightforward repairs and component replacements, thereby extending the device's usable lifespan, reducing electronic waste, and aligning with Fairphone's core mission.
The Fairphone 4 originally shipped with Android 11 ('Red Velvet Cake') and was later updated to Android 13 ('Tiramisu').
Answer: True
Explanation: The Fairphone 4 was initially released with Android 11 ('Red Velvet Cake') and has since received updates, including to Android 13 ('Tiramisu'), reflecting Fairphone's commitment to software longevity.
Fairphone guaranteed software support for the Fairphone 4 until at least 2026, offering major Android updates and security patches.
Answer: True
Explanation: Fairphone committed to providing software support for the Fairphone 4 until a minimum of 2026, encompassing major Android version upgrades and regular security patches, thereby ensuring the device remains functional and secure over an extended period.
The Fairphone 4 supports alternative operating systems such as LineageOS, CalyxOS, and /e/ OS, in addition to the stock Fairphone OS.
Answer: True
Explanation: Beyond its native Fairphone OS, the Fairphone 4 officially supports various alternative operating systems, including LineageOS, CalyxOS, and /e/ OS, offering users greater flexibility and customization options.
Software updates for the Fairphone 4 will continue beyond its end-of-sale date in December 2024.
Answer: True
Explanation: Fairphone has affirmed that software updates for the Fairphone 4 will persist even after its official end-of-sale date in December 2024, underscoring their commitment to long-term device support.
Which operating system did the Fairphone 4 originally come with?
Answer: Android 11 ('Red Velvet Cake')
Explanation: The Fairphone 4 originally shipped with Android 11, codenamed 'Red Velvet Cake'.
What was the initial warranty period offered with the Fairphone 4?
Answer: Up to 5 years
Explanation: The Fairphone 4 was initially offered with a warranty period extending up to five years, contingent on the purchase date, which significantly exceeds the typical warranty duration provided by many smartphone manufacturers.
Which privacy-focused alternative operating system is mentioned as being supported on the Fairphone 4?
Answer: CalyxOS
Explanation: CalyxOS, a privacy-focused Android distribution, is among the alternative operating systems mentioned as being supported on the Fairphone 4.
Reviewers generally praised the Fairphone 4 for its long-term software support commitment and extended warranty.
Answer: True
Explanation: Critical reception of the Fairphone 4 frequently highlighted its robust commitment to long-term software support and its extended warranty period as significant advantages, contributing positively to its overall user experience and value proposition.
Criticisms of the Fairphone 4 included the removal of the headphone jack and areas for improvement in camera and fingerprint sensor performance.
Answer: True
Explanation: Common criticisms directed at the Fairphone 4 included the omission of a headphone jack, a feature valued by many users, and observations that aspects such as camera performance and the fingerprint sensor could benefit from further refinement.
GrapheneOS criticized the Fairphone 4 for being shipped with publicly accessible private keys for its firmware and stock operating system, compromising verified boot.
Answer: True
Explanation: GrapheneOS identified a critical security flaw in the Fairphone 4, citing its distribution with publicly accessible private keys in the firmware and stock OS, which fundamentally compromises the integrity of verified boot mechanisms.
What common feature, valued by some users, was criticized for being removed from the Fairphone 4?
Answer: The headphone jack
Explanation: The removal of the headphone jack, a feature still valued by a segment of users, was a notable point of criticism for the Fairphone 4.
According to GrapheneOS, what security issue did the Fairphone 4 have related to its firmware?
Answer: Shipping with publicly accessible private keys
Explanation: GrapheneOS reported that the Fairphone 4 was shipped with publicly accessible private keys within its firmware, a practice that compromises critical security features such as verified boot.
What security mechanism, according to GrapheneOS, was potentially compromised on the Fairphone 4 due to its firmware practices?
Answer: Verified boot
Explanation: According to GrapheneOS, the Fairphone 4's firmware practices, specifically the distribution of publicly accessible private keys, potentially compromised the integrity of the verified boot mechanism.