📡 SIM Card and Antennas
📱 SIM Card
IMPORTANT! Do not handle the SIM with the device powered on.
SIM Requirements
| Feature | Requirement |
|---|---|
| Size | Mini SIM (2FF) |
| Data | Active data plan |
| PIN | Disabled |
| Roaming | As needed |
Installation
- Disconnect device power
- Insert the SIM with contacts facing down
- Verify it is properly seated
- Connect power
📶 Internal Antennas
📦
The Zero IoT has integrated internal antennas. No external antennas need to be connected.
📶 GSM/GPRS
| Frequencies | 850/900/1800/1900 MHz |
| Type | Internal antenna |
🛰️ GPS/GNSS
| Frequencies | 1575.42 MHz (L1) |
| Type | Internal antenna |
📍 Location Considerations
💡
Having internal antennas, device location is crucial for obtaining good signal.
Recommendations
✅ Position with sky view for better GPS reception
✅ Avoid placing inside closed metal boxes
✅ Keep away from electromagnetic interference sources
⚠️ In vehicles: prefer location under dashboard or windshield
🔧 Signal Verification
| Test | Command | OK Result |
|---|---|---|
| GSM | >QCEL< | Operator + signal |
| GPS | >QGPS< | Valid coordinates |
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