Introduction
This manual provides comprehensive instructions for the operation, maintenance, and troubleshooting of your EBTOOLS YEEMI K21+ 4G Flip Phone. Designed with seniors in mind, this phone features large buttons, dual screens, and essential functions like SOS and GPS for enhanced safety and ease of use. Please read this manual carefully to ensure proper use and to maximize the phone's capabilities.
1. Setup
1.1 Package Contents
Before you begin, please verify that all items are present in the package:
- EBTOOLS YEEMI K21+ 4G Flip Phone
- Battery
- USB Cable
- User Manual (this document)

Image: The phone, battery, and USB cable included in the package.
1.2 Inserting the SIM Card and Battery
- Open the Back Cover: Gently pry open the back cover of the phone.
- Insert SIM Card(s): Locate the SIM card slot(s). This phone supports dual SIM. Carefully insert your 4G compatible SIM card(s) into the designated slot(s) with the gold contacts facing down.
- Insert Battery: Align the battery contacts with the phone's contacts and gently press the battery into place.
- Close Back Cover: Replace the back cover, ensuring it clicks securely into place.

Image: The phone in its open position, ready for SIM card and battery insertion.
1.3 Charging the Battery
Before first use, fully charge the phone's battery.
- Connect the small end of the USB cable to the phone's charging port.
- Connect the other end of the USB cable to a compatible USB power adapter (not included) or a computer's USB port.
- The charging indicator on the screen will show the charging status.
2. Operating Instructions
2.1 Power On/Off
- To Power On: Press and hold the Power/End Call button (red button) until the screen lights up.
- To Power Off: Press and hold the Power/End Call button until the power off options appear, then select "Power Off".
2.2 Making and Receiving Calls
- Making a Call:
- Enter the phone number using the large keypad buttons.
- Press the Call button (green button) to dial.
- Receiving a Call:
- When the phone rings, open the flip to answer, or press the Call button.
- To end a call, press the Power/End Call button.

Image: The phone showcasing its dual display feature, with the internal screen open and the external screen visible when closed.
2.3 Dual Screens and Large Font
The phone features a 2.6-inch high-definition main screen and a 1.77-inch external color high-definition screen. The external screen displays important information like time, date, and incoming call notifications without needing to open the phone. Large fonts and icons are used throughout the interface for improved readability.

Image: A close-up view of the phone's external screen, highlighting its dual SIM dual standby capability.
2.4 SOS and GPS Functionality
For emergencies, the phone is equipped with an SOS button and GPS positioning.
- Setting up SOS Contacts: Navigate to the SOS settings in the phone's menu to add emergency contact numbers.
- Activating SOS: In an emergency, press and hold the dedicated SOS button (usually located on the back or side of the phone). The phone will automatically call and send an emergency message with your GPS location to the pre-set SOS contacts.

Image: The back of the phone, highlighting the speaker area, which contributes to clear sound for emergency calls.
2.5 Speed Dial and Shortcut Buttons
The phone supports 9 speed dial buttons for quick dialing of family numbers and 3 dedicated shortcut buttons for frequently used functions.
- Setting Speed Dial: Refer to the phone's menu for instructions on assigning contacts to speed dial numbers (typically 2-9).
- Using Shortcut Buttons: The dedicated shortcut buttons provide quick access to features like Camera, Messaging, or FM Radio.
3. Maintenance
3.1 Battery Care
- Avoid exposing the battery to extreme temperatures.
- Do not puncture, disassemble, or short-circuit the battery.
- If the phone will not be used for an extended period, charge the battery to about 50% before storing it.
3.2 Cleaning Your Phone
- Use a soft, lint-free cloth to clean the phone's screen and body.
- Do not use harsh chemicals, cleaning sprays, or abrasive materials.
- Keep the charging port and speaker grilles free of dust and debris.
4. Troubleshooting
If you encounter issues with your phone, please refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Phone does not power on. | Battery is drained or not properly inserted. | Charge the battery. Ensure the battery is correctly inserted. |
| Cannot make or receive calls. | No SIM card, SIM card not properly inserted, or no network signal. | Ensure SIM card is inserted correctly. Check network signal strength. Contact your service provider. |
| Poor call quality. | Weak network signal, or speaker/microphone obstruction. | Move to an area with better signal. Clean speaker and microphone openings. |
| SOS function not working. | SOS contacts not set up, or no network signal. | Verify SOS contacts are correctly configured in settings. Ensure phone has network signal. |
5. Specifications
Key technical specifications for the EBTOOLS YEEMI K21+ 4G Flip Phone:
- Model: EBTOOLS1756ogbieh-12
- Connectivity: 4G (supports 2G, 3G, and 4G network bands including GSM and CDMA)
- Main Screen: 2.6-inch High Definition
- External Screen: 1.77-inch Color High Definition
- Battery Capacity: 4800mAh (Long Standby Time)
- Features: Large Buttons, Dual Screens, SOS with GPS Positioning, 9 Speed Dial Buttons, 3 Dedicated Shortcut Buttons, Clear Sound Speaker
- Dimensions: Approximately 5.51 x 3.15 x 2.76 inches (Package Dimensions)
- Country of Origin: China
6. Warranty and Support
Your EBTOOLS YEEMI K21+ 4G Flip Phone comes with a standard manufacturer's warranty. Please refer to the warranty card included in your package for specific terms and conditions. For technical support, troubleshooting assistance beyond this manual, or warranty claims, please contact the seller or manufacturer directly.
Manufacturer: EBTOOLS
For further assistance, you may visit the EBTOOLS Store on Amazon.





