1. Introduction
The TIDRADIO TD-M15 is a state-of-the-art Push-to-Talk Over Cellular (POC) radio designed for global communication without distance limitations. Utilizing 4G LTE networks and a provided global SIM card with one year of free data, it offers reliable and clear communication over vast distances, making it ideal for professional teams, outdoor enthusiasts, and family communication.

Figure 1: TIDRADIO TD-M15 Global Walkie Talkie
2. What's in the Box
Please check the package contents upon unboxing:
- TIDRADIO TD-M15 POC Radio Unit(s)
- Global IoT SIM Card(s)
- Li-ion Battery Pack(s)
- USB-A to USB-C Charging Cable(s)
- Power Adapter(s)
- Wrist Strap(s)
- User Manual (this document)

Figure 2: Package Contents
3. Setup Guide
Follow these steps to get your TD-M15 radio ready for use.
3.1. SIM Card Installation
- Push the SIM card slot latch downward to open it.
- Place the SIM card into the slot with the contacts facing down.
- Close the latch.
- Gently push the latch upward to secure it.
3.2. Battery Installation
- Align the battery with the compartment on the back of the radio.
- Gently press the battery until it clicks into place.
- Ensure the battery latch is securely closed.
3.3. Powering On/Off
To power on the device, long press the back button (usually the 'Exit' or 'Back' button) until the TIDRADIO logo appears on the screen. To power off, long press the same button until the device shuts down.
3.4. Odmaster APP Download & Registration
The Odmaster app is essential for managing your TD-M15 radio. You can download it from the Apple App Store or Google Play Store.
- Open your phone's App Store (iOS) or Google Play Store (Android).
- Search for