Introduction
This user manual provides detailed instructions for the Maxcom MM835 4G Dual SIM mobile phone. Please read this manual carefully before using your device to ensure proper operation and to maximize its features. Keep this manual for future reference.

Image: Maxcom MM835 4G Dual SIM mobile phone, open, displaying the internal screen and large, backlit keypad.
Setup
1. Battery Installation and Charging
The Maxcom MM835 comes with a 1400 mAh battery. Before first use, ensure the battery is properly installed and fully charged.
- Remove the back cover of the phone.
- Insert the battery into its compartment, ensuring the contacts align.
- Replace the back cover.
- Connect the USB-C cable (not included) to the phone's charging port and plug the other end into a compatible USB power adapter.
- Allow the phone to charge until the battery indicator shows full.
2. SIM Card Installation
The MM835 supports Dual SIM functionality.
- With the phone powered off and the back cover removed, locate the SIM card slots.
- Carefully insert your SIM card(s) into the designated slots, ensuring correct orientation.
- Replace the back cover and battery.
3. Initial Power On
Press and hold the Power/End Call button until the screen illuminates. Follow any on-screen prompts for initial setup.
Operating Instructions
1. Understanding the Displays
The MM835 features two displays: a 3.5-inch internal screen and a 2.4-inch external screen.
- Internal Screen (3.5 inches): Used for navigating menus, reading messages, viewing contacts, and other primary functions.
- External Screen (2.4 inches): Displays essential information such as date, time, battery status, and missed calls without needing to open the phone.

Image: Maxcom MM835 4G Dual SIM mobile phone, closed, with the external screen showing the current time and date.
2. Making and Receiving Calls
- To Make a Call: Open the phone, dial the number using the large keypad, and press the Green Call button.
- To Receive a Call: When the phone rings, open the phone (if closed) and press the Green Call button.
- To End a Call: Press the Red End Call button.
3. Sending and Receiving Messages
Navigate to the "Messages" menu from the main screen. You can compose new messages or read incoming ones. The large, backlit keys facilitate typing.
4. SOS Button Functionality
The SOS button is located on the main keypad. In an emergency, press and hold this button to send pre-defined notifications to emergency contacts. Ensure emergency contacts are set up in the phone's settings.

Image: A close-up view of the Maxcom MM835 keypad, showing the prominent SOS button for emergency use.
5. Camera Usage
The phone includes a simple camera for capturing photos. Access the camera through the main menu.
6. FM Radio
The built-in FM Radio allows you to listen to your favorite stations. Connect headphones (not included) to use as an antenna.
7. Bluetooth Connectivity
The MM835 supports Bluetooth for connecting to compatible devices such as car kits or headsets. Navigate to the "Settings" menu, then "Bluetooth" to enable and pair devices.
Maintenance
1. Battery Care
- Avoid exposing the battery to extreme temperatures.
- Do not puncture or damage the battery.
- Use only compatible USB-C charging cables.
2. Cleaning Your Phone
Use a soft, dry cloth to clean the phone's exterior. Avoid using harsh chemicals or abrasive materials.
Troubleshooting
- Phone does not power on: Ensure the battery is charged and correctly installed.
- Cannot make/receive calls: Check SIM card installation and network signal strength. Ensure your account is active.
- No sound: Check volume settings. Ensure the phone is not in silent mode.
- Charging issues: Verify the USB-C cable and power adapter are working correctly. Ensure the charging port is clean.
Specifications
| Brand | Maxcom |
| Model Name | MM835 |
| Product Type | Flip Phone |
| Operating System | Maxcom OS |
| Internal Screen Size | 3.5 Inches |
| External Screen Size | 2.4 Inches |
| Resolution | 640 x 360 pixels |
| Cellular Technology | 4G |
| Connectivity Technology | 4G, Bluetooth |
| Special Features | Dual SIM, SOS Button, Hearing Aid Compatible (HAC), Large Backlit Keys, FM Radio |
| Camera Resolution | 1.0 MP (approx.) |
| Battery Capacity | 1400 mAh |
| Charging Port | USB Type-C |
| Memory Storage Capacity | 32 GB (likely for expandable storage) |
| Color | Red |
Warranty and Support
For warranty information and customer support, please refer to the documentation provided with your purchase or visit the official Maxcom website. Information regarding spare parts availability is not provided in this manual.





