1. Introduction
This user manual provides comprehensive instructions for the artfone A400 4G Volte Big Button Cell Phone. It covers essential information regarding the phone's features, setup, operation, maintenance, and troubleshooting. Please read this manual carefully to ensure proper use and to maximize the phone's capabilities.
2. Product Overview
The artfone A400 is designed with user-friendliness in mind, particularly for seniors. It features large buttons, a clear 2.4-inch LCD display, and a super-loud speaker for enhanced accessibility. Key features include 4G VoLTE compatibility, an SOS button, a 2MP camera, and a convenient charging dock.
2.1. Package Contents
- 1x artfone A400 Mobile Phone (Battery not installed)
- 1x 1800mAh Battery
- 1x USB Charger Cable
- 1x Charging Base/Stand
- 1x User Manual
2.2. Phone Components





3. Setup
3.1. Installing the Battery and SIM Card
- Carefully remove the back cover of the phone. The cover is designed to be pried loose from the bottom slot. Gently lift the sides to avoid damage.
- Insert the 1800mAh battery into the battery compartment, ensuring the contacts align correctly.
- Insert your Nano SIM card(s) into the designated slot(s). The phone supports Dual-Nano SIM.
- (Optional) Insert a Micro SD card (up to 64GB) into the Micro SD slot for expanded memory.
- Replace the back cover, pressing firmly until it clicks into place.

3.2. Charging the Phone
The artfone A400 can be charged using the included USB Type-C cable or the charging dock.
- Using the Charging Dock: Place the phone into the charging base/stand. Ensure the phone is seated correctly and the charging indicator appears on the screen.
- Using the USB Cable: Connect the USB Type-C cable to the phone's charging port and the other end to a compatible USB power adapter.
A full charge provides 8-10 hours of talk time and nearly a week of standby time.


3.3. Charging Demonstration Video
Video 3.3.1: This video demonstrates how to charge the artfone A400 mobile phone using both the Type-C cable and the charging station.
4. Operating Instructions
4.1. Basic Functions
- Power On/Off: Long press the Power button (usually the red hang-up button) to turn the phone on or off.
- Making Calls: Dial the number using the large keypad and press the green call button.
- Answering Calls: Press the green call button when the phone rings.
- Sending SMS: Navigate to the 'Message' menu, compose your text, and send. The T9 predictive text input is available.

4.2. SOS Emergency Function
The SOS button on the back of the phone is a critical safety feature. In an emergency:
- Press and hold the SOS button for 3 seconds.
- The phone will automatically dial up to five preset emergency numbers sequentially until one is answered.
- A distress SMS message will also be sent to these contacts.

4.3. SOS Function Demonstration Video
Video 4.3.1: This video demonstrates the SOS emergency call feature of the artfone A400, showing how it quickly connects to pre-set emergency contacts.
4.4. Speed Dial
The phone supports speed dialing for frequently contacted individuals. Dedicated M1/M2/*/# keys and numbers 2-9 can be assigned for quick access.
- To set up speed dial, navigate to the phone's settings or contacts menu and assign numbers to the desired keys.
- Once set, simply long-press the assigned key to dial the contact.
4.5. Time Announcement
The artfone A400 features a unique one-button time announcement function.
- Long press the Volume + key for 3 seconds to hear the current time announced.
4.6. Other Features
- Personalized Contacts: Set pictures for each contact to facilitate caller ID recognition.
- Storage: Store up to 1000 contacts.
- Multimedia: Supports audio and video playback.
- Connectivity: Bluetooth enabled.
- Tools: FM radio, calculator, alarm, calendar. Multiple alarm settings are useful for medication reminders.
- Flashlight: The phone includes a built-in flashlight for convenience.


5. Maintenance and Care
- Keep the phone dry. Moisture can damage the electronic circuits.
- Do not expose the phone to extreme temperatures. High temperatures can shorten the life of electronic devices and warp or melt certain plastics.
- Do not use harsh chemicals, cleaning solvents, or strong detergents to clean the phone. Wipe it with a soft, damp cloth.
- Handle the phone gently. Do not drop, knock, or shake it. Rough handling can break internal circuit boards and fine mechanics.
- Use only the supplied or approved replacement battery and accessories.
6. Troubleshooting
Problem | Possible Cause | Solution |
---|---|---|
Phone does not turn on | Battery is low or depleted. | Charge the phone for at least 30 minutes. Ensure the battery is properly installed. |
Cannot make or receive calls | No SIM card installed or SIM card not properly inserted. No network signal. | Ensure SIM card is correctly inserted. Check network signal strength. Contact your carrier for network compatibility (T-Mobile highly recommended). |
Poor call quality / Low speaker volume | Speaker/receiver obstructed. Volume setting too low. | Ensure speaker and receiver are clear. Adjust volume using the side buttons. |
SOS button not working | Emergency numbers not set. | Go to SOS settings and configure emergency contacts. Ensure numbers are valid. |
Battery drains quickly | Frequent usage. Old battery. | Reduce screen brightness. Close unused applications. Consider replacing the battery if it's old. |
7. Specifications
Feature | Detail |
---|---|
Model | Flagship A400 |
Brand | artfone |
Display | 2.4-inch LCD (240*320 pixels) |
Operating System | artfone Mocor RTOS |
Cellular Technology | 4G |
Wireless Carrier Compatibility | T-Mobile (highly recommended), SpeedTalk, Tello, MetroPCS, RedPocket. May work with AT&T, Sprint, Boost Mobile, U.S. Cellular. Not compatible with Verizon. |
Battery Capacity | 1800 mAh |
Talk Time | 8-10 Hours |
Standby Time | Nearly a week |
Camera | 2MP |
Memory (RAM/ROM) | 48 MB RAM / 0.13 GB Storage (128+48MB) |
Expandable Memory | Micro SD up to 64GB |
SIM Card Type | Dual-Nano SIM |
Dimensions | 5.71 x 2.61 x 0.52 inches |
Weight | 10 ounces (284 Grams) |
Audio Jack | 3.5 mm |
Special Features | Big Buttons, Loud Speaker, SOS Button, Speed Dial, Time Announcement, Flashlight, FM Radio, Calculator, Alarm, Calendar. |
8. Warranty and Support
For warranty information and customer support, please refer to the documentation included with your purchase or visit the official artfone website. You may also contact the seller directly for assistance.
Seller Contact: artfone (via Amazon)
Protection Plans: Optional 2-Year Protection Plan and Complete Protect monthly plan are available for purchase separately.