Kyocera GRATINA KYF44

A model targeted towards corporate users for KDDI. This model has a version with the camera removed as well as the SD card slot disabled. This phone also features the same SoC as the Kyocera DIGNO Keitai 4, but seems to have the body of the Kyocera GRATINA KYF42. Due to the SoC it may be possible to root the phone with MTKClient or by other means.

Specs

Phone	KYF44¹	KYF44 (no camera/SD card)²
CPU	MediaTek Helio A22 2.0GHz quad-core (one core is disabled)
RAM	1 GB
Internal storage	8 GB
External storage	microSDHC officially supporting up to 32 GB	SD card slot disabled
Battery	1,500mAh (removable)
Battery model	KYF36UAA
Primary display	3.4“ TFT 854×480
External display	0.9” OLED
Camera	8MP	None
Operating system	?
Durability ratings	IPX5/IPX8/IP5X, MIL-STD-810H
Dimensions	51×112×17.9mm
Release date	August 1st, 2024³
Colors	Black

Connectivity

Main article: Cellular bands

Radios⁴
4G bands (LTE)	1, 3, 18
3G bands (W-CDMA)	1
2G bands (GSM)	Unknown

Miscellaneous^5,^6,⁷
Calling	VoLTE
Wi-Fi	2.4GHz: IEEE802.11b/g/n
Bluetooth	5.1
Ports	USB-C
Tethering	Up to ten devices
Other features	GPS, FM radio

Audio over USB-C

The USB port on the device exclusively uses “Audio Accessory Mode” for audio, which only allows audio as an analog signal⁸. This boils down to the device not supporting audio cables that have a DAC (Digital-to-Analog Converter) anywhere within them. Many USB-C to 3.5mm adapters have a DAC built into them, and will not function. Adapters of without DACs may be found online, but may not advertise this.

Inline remotes have yet to be tested.

Operating system

Kyocera releases source code for the kernel and open source components of the operating system. Both models seem to use the same version codes and updates.