Introduction
This manual provides detailed instructions for the setup, operation, and maintenance of your BISOFICE ETS-6588 Fixed Wireless Desktop Phone. This device supports dual 2G SIM cards and operates on GSM frequencies (850/900/1800/1900MHZ), offering a reliable communication solution for various environments. Please read this manual thoroughly before using the phone to ensure proper functionality and longevity.
Package Contents
Upon unpacking, please verify that all the following items are included:
- 1 x BISOFICE ETS-6588 Fixed Wireless Desktop Phone
- 1 x Charging Cable
- 1 x Coil Cord (for handset)
- 1 x Built-in 1000mAh Li-ion Battery
- 1 x User Guide (English)
Product Overview
The BISOFICE ETS-6588 is designed for ease of use and stable communication. Key features include:
- Dual SIM Card Support: Accommodates two 2G GSM SIM cards.
- GSM Frequency Bands: 850/900/1800/1900MHZ for broad network compatibility.
- Multi-functionality: Includes speed dial, call record storage (up to 50 groups), radio, and alarm clock functions.
- Multinational System Language: Supports Chinese, English, French, Spanish, and Portuguese.
- Powerful Battery: Built-in 1000mAh Li-ion battery provides extended standby time.
- Adjustable Brightness: 7 levels of display font brightness for optimal readability.
- External Antenna: Enhances signal reception for clear and stable calls.

Image: BISOFICE ETS-6588 Fixed Wireless Desktop Phone showing its dimensions (25cm x 20cm x 6.8cm).
Setup Instructions
1. SIM Card Installation
The phone supports dual SIM cards. Locate the SIM card slots, typically found under the battery compartment. Carefully insert your 2G GSM SIM card(s) into the designated slots. Ensure the SIM card is correctly oriented according to the diagram near the slot. If using a smaller SIM card (e.g., Nano or Micro SIM), an appropriate adapter may be required to ensure stable contact with the phone's electrodes.
2. Battery Installation
Open the battery compartment cover on the back of the phone. Insert the provided 1000mAh Li-ion battery, ensuring the contacts align correctly with the phone's terminals. Close the battery compartment cover securely.

Image: Close-up of the 1000mAh Li-ion battery for the BISOFICE ETS-6588 phone, showing its specifications and warning labels.
3. Antenna Installation
Attach the external antenna to the designated port on the side or back of the phone. Ensure it is screwed in firmly but do not overtighten. The external antenna helps to improve signal reception for clearer calls.

Image: The BISOFICE ETS-6588 phone highlighting its external antenna, indicating improved signal reception.
4. Powering On/Off
Press and hold the On/Off button (usually red or marked with a power symbol) to power on or power off the device. The display will light up upon successful power-on.
Operating Instructions
1. Making and Receiving Calls
- Making a Call: Dial the desired phone number using the keypad and press the Dial or Send button.
- Receiving a Call: When the phone rings, lift the handset or press the Hands-Free button to answer.
- Ending a Call: Place the handset back on the cradle or press the End button.
2. Language Settings
To change the system language, navigate to the Menu, then select Settings, and find the Language option. You can choose from Chinese, English, French, Spanish, and Portuguese.

Image: The BISOFICE ETS-6588 phone display showing options for 5 interface languages: Chinese, English, French, Spanish, and Portuguese.
3. Display Brightness Adjustment
The phone features 7 levels of display brightness. Access this setting through the Menu to adjust the display to your preferred level based on ambient lighting conditions.
4. Radio Function
To use the built-in radio, navigate to the Radio option in the main menu. Follow the on-screen prompts to scan for stations and adjust volume.
5. Alarm Clock
Set alarms by accessing the Alarm Clock function in the menu. You can set multiple alarms with customizable times and tones.
6. Speed Dial and Call Records
- Speed Dial: Refer to the phone's menu for instructions on programming speed dial numbers. This allows for quick dialing of frequently used contacts.
- Call Records: The phone automatically records up to 50 groups of call records (dialed, received, missed calls). Access these through the Call History or Call Records option in the menu.
7. SMS Messaging
The phone supports sending and receiving SMS messages. Navigate to the Messages menu. Text input is done using the numeric keypad, requiring multiple presses for alphabetic characters. Due to the keypad design, entering long messages or complex contact names can be slow.
Maintenance
- Cleaning: Use a soft, dry cloth to clean the phone's surface. Avoid using liquid cleaners or abrasive materials.
- Battery Care: Charge the battery regularly. Avoid fully discharging the battery frequently to prolong its lifespan. If the phone will not be used for an extended period, charge the battery to about 50% and store it in a cool, dry place.
- Storage: Store the phone in a dry environment, away from direct sunlight and extreme temperatures.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Phone does not power on. | Battery is discharged or not installed correctly. | Charge the battery using the provided charging cable. Ensure the battery is correctly inserted and the contacts are clean. |
| "No SIM" or "Insert SIM" error. | SIM card is not inserted correctly or is incompatible. | Power off the phone, re-insert the SIM card(s) carefully, ensuring proper orientation and secure contact. If using a smaller SIM, ensure a suitable adapter is used. Verify the SIM card is a 2G GSM card. |
| Poor signal reception. | Weak network coverage or antenna issue. | Ensure the external antenna is securely attached. Move the phone to an area with better network coverage. |
| Cannot make or receive calls. | No network signal, SIM card issue, or account problem. | Check for network signal strength. Verify SIM card installation. Contact your service provider to ensure your account is active and has credit. |
| Display is too dim or too bright. | Brightness setting is not optimal. | Adjust the display brightness through the phone's menu settings (7 levels available). |
Specifications
| Feature | Detail |
|---|---|
| Model | ETS-6588 |
| Brand | Bisofice |
| GSM Frequency | 850/900/1800/1900MHZ |
| SIM Card Support | Dual 2G SIM |
| Battery Type | 3.7V 1000mAh Li-ion Battery |
| Phone Talk Time | Up to 10 Hours |
| Phone Standby Time | Up to 120 Hours (5 days) |
| Display | LCD with 7 levels brightness adjustment |
| System Languages | Chinese, English, French, Spanish, Portuguese |
| Caller ID | Yes |
| Answering System Type | Digital |
| Material | Plastic |
| Item Weight | 650 Grams |
| Item Dimensions (approx.) | 25 cm x 20 cm x 6.8 cm |
Warranty and Support
For warranty information and technical support, please refer to the documentation provided at the time of purchase or contact your retailer. Keep your purchase receipt as proof of purchase for any warranty claims.