Fujitsu ARROWS ef

ARROWS ef FJL21

Brand	au
Manufacturer	Fujitsu Mobile Communications
Series	Arrows
First released	November 2, 2012 (2012-11-02)
Compatible networks	3G: CDMA2000 1xMC (au 3G) (New 800 MHz / 2 GHz), W-CDMA (850 MHz / 2 GHz) 2G: GSM (1.9 GHz / 1.8 GHz / 900 MHz)
Form factor	Bar
Colors	Soft Blue   Solid Black   Pink Gold
Dimensions	127 mm (5.0 in) H 62 mm (2.4 in) W 10.7 mm (0.42 in) D
Weight	139 g (4.9 oz)
Operating system	Android 4.0.4, upgradable to 4.1.2
CPU	1.5 GHz dual-core Qualcomm Snapdragon S4 (MSM8960)
Memory	1 GB RAM
Storage	8 GB ROM
Removable storage	microSD (up to 2 GB), microSDHC (up to 32 GB), microSDXC (up to 64 GB) (officially supported by KDDI)
Battery	1,800 mAh
Rear camera	Approx. 8.1 megapixels CMOS, autofocus, Full HD video recording
Front camera	Approx. 1.2 megapixels CMOS
Display	4.3-inch TFT LCD, HD (720 × 1280 pixels), approx. 16.77 million colors
Water resistance	Waterproof and dustproof
Model	FJL21
Made in	Japan
References	1. SAR value: 0.439 W/kg 2. Equipped with an FM transmitter

The ARROWS ef FJL21 is a smartphone developed for the Japanese domestic market by Fujitsu Mobile Communications (under the Fujitsu brand, currently FCNT). It was released for KDDI and Okinawa Cellular Telephone Company under the au brand, featuring support for CDMA 1X WIN (au 3G) and 3.9G (au 4G LTE) mobile communication systems. It was released on November 2, 2012.

It was updated to the version V35R45B and addresses critical bugs, most notably resolving an issue where incoming voice calls would occasionally fail to connect and leave no entry in the call history. It also corrects a display bug that caused wallpapers to appear abnormally enlarged.

Specifications

The ARROWS ef is a compact flagship smartphone released for the Japanese carrier au as part of the high-end ARROWS series. Despite its smaller 4.3-inch display—a departure from the series' traditionally larger form factors—the device maintains high-end specifications. To appeal to a broader demographic seeking smaller devices, the manufacturer utilized narrow-bezel technology to minimize the phone's physical footprint without reducing the screen size.

The smartphone incorporates several proprietary hardware and software features designed to improve usability. These include the "Human Centric Engine," which utilizes sensors to keep the display active while the user is actively viewing it, and a rear-mounted fingerprint sensor that doubles as a physical power switch for the display. Additionally, the device features a fast-focusing camera, the "NX! Eco" power-saving utility, and a scratch- and fingerprint-resistant exterior coating known as "Ultra Tough Guard Plus."