Yeacomm YF-P21-Black
Yeacomm 4G LTE CPE Router User Manual
Model: YF-P21-Black
1. Úvod
This manual provides detailed instructions for the setup, operation, and maintenance of your Yeacomm 4G LTE CPE Router. This device is designed to provide reliable wireless and wired internet access for home and office environments by utilizing a 4G LTE SIM card.

Obrázek 1: Přední strana view of the Yeacomm 4G LTE CPE Router with LED indicators.
2. Vlastnosti produktu
- Supports multiple 4G LTE frequency bands (FDD: B2/B3/B4/B5/B7/B8/B28, TDD: 38/39/40/41) and 3G HSPA+ (850Mhz/900Mhz/1900Mhz).
- Unlocked 4G router with SIM card slot for easy internet access. Note: SIM card must be activated and support hotspot services.
- Wi-Fi Standard: IEEE 802.11b/g/n, providing wireless connectivity.
- Equipped with two external 4G cellular antennas and built-in Wi-Fi antennas for enhanced signal reception.
- Features include Band Locking Function, IPv4/IPv6 dual stack, L2TP VPN, and TR069 management.
- LED indicator display for easy status monitoring.
- Includes 2 RJ11 ports for voice calling and 4 RJ45 LAN ports for wired connections.
3. Obsah balení
Ověřte, zda jsou v balení přítomny všechny položky:
- 1x Yeacomm P21 4G LTE SIM Card Router
- 1x kabel RJ45
- 1x Power Adapter (DC output 12V 1A, AC input 100V-240V)
- 1x User Manual/After-sales Card
- Antennas (2 external 4G cellular antennas)

Figure 2: Contents included in the Yeacomm P21 package.
4. Průvodce nastavením
4.1. Instalace hardwaru
- Vložte SIM kartu: Ensure your SIM card is activated and supports hotspot services. The router requires a standard SIM card (15x25mm). Micro and Nano SIM cards are not directly supported without an adapter.

Figure 3: Correct SIM card insertion.
- Připojení antén: Screw the two external 4G cellular antennas firmly into the SMA ports on the back of the router.

Figure 4: Antenna connection points.
- Plug in Power Cable: Connect the provided power adapter to the router's power input port and then to a power outlet.
- Počkejte na indikátory: Allow a few moments for the router to power on and initialize. Observe the LED indicators on the front panel. The "SIG" (signal) and "4G/LTE" indicators should light up, indicating a successful connection to the cellular network.
4.2. Počáteční konfigurace (Web Rozhraní)
Pro přístup k routeru web management interface for advanced settings:
- Připojení k routeru: Connect your computer to the router via an Ethernet cable (RJ45 port) or wirelessly using the Wi-Fi SSID and password printed on the router's label.
- Přístup Web Rozhraní: Otevřete a web prohlížeč a zadejte výchozí IP adresu 192.168.0.1 v adresním řádku.
- Přihlášení: Enter the default username vykořenit a heslo admin (or as specified on the router's label) to log in.
- Konfigurace nastavení APN: Přejděte na Device Settings > Internet Settings > APN. Click "Add New" to set the correct APN for your SIM card's carrier. You can find the APN information on your carrier's official website or by searching online. Apply the settings.
- Výběr sítě: In Device Settings > Internet Settings > Network Selection, you can choose "Automatic" or specify "4G Only", "3G Only", etc., based on your preference and network availability.
- Band Locking (Optional): For advanced users, the router supports band locking. Navigate to Device Settings > Advanced Settings > Frequency. Here you can enable/disable specific frequency bands. Your settings will take effect after restarting the device.

Figure 5: Quick setup guide for the router.
5. Obsluha routeru
5.1. Wi-Fi připojení
Once the router is set up and connected to the cellular network, you can connect your devices (smartphones, laptops, tablets) to its Wi-Fi network. The default Wi-Fi SSID and password are provided on a sticker on the router.
- Hledat dostupné sítě Wi-Fi na vašem zařízení.
- Select the router's SSID (e.g., ZLT P21_0C7220).
- Enter the Wi-Fi password (KEY) when prompted.
5.2. Drátové připojení
Use the RJ45 LAN ports on the back of the router to connect devices such as desktop computers, smart TVs, or gaming consoles via Ethernet cables for a stable wired connection.

Figure 6: Router back panel with labeled ports.
5.3. Voice Calling (RJ11 Ports)
The router includes two RJ11 ports for voice calling functionality. You can connect a standard analog telephone to these ports. This feature is supported when using SIM cards from carriers like T-Mobile. The voice function may not work with Verizon's SIM cards.
To enable/configure voice settings, navigate to Device Settings > Voice Settings v web rozhraní.
5.4. Správa dat
The web interface allows you to monitor and manage your data usage. Navigate to Device Settings > Statistics Settings na view data usage statistics and set data plans or alerts.
6. Údržba
- Uchovávejte router v dobře větraném prostoru, abyste zabránili jeho přehřátí.
- Clean the router regularly with a soft, dry cloth. Do not use liquid cleaners.
- Ensure antennas are securely connected for optimal signal reception.
- Pravidelně kontrolujte aktualizace firmwaru prostřednictvím web rozhraní (System Settings > System Upgrade) pro zajištění optimálního výkonu a zabezpečení.
- If the router becomes unresponsive, perform a reboot via the web rozhraní (System Settings > Reboot) nebo odpojením a opětovným zapojením napájecího adaptéru.
7. Řešení problémů
If you encounter issues with your Yeacomm 4G LTE CPE Router, refer to the following common troubleshooting steps:
| Problém | Možná příčina | Řešení |
|---|---|---|
| Žádné připojení k internetu | SIM card not activated or incorrect APN settings. No cellular signal. | Ensure SIM card is active and supports hotspot services. Verify APN settings in the web interface. Check the "SIG" LED indicator for signal strength. Relocate the router for better signal. |
| Pomalá rychlost internetu | Weak cellular signal. Network congestion. Incorrect band selection. | Move the router to an area with stronger signal. Try using the Band Locking feature in advanced settings to select a less congested band if available in your area. |
| Wi-Fi Not Visible or Connectable | Wi-Fi disabled. Incorrect password. | Zkontrolujte nastavení Wi-Fi v web rozhraní (Home Network > Wireless Settings). Ensure Wi-Fi is enabled and the password is correct. |
| Voice Calling Not Working | SIM card carrier does not support voice over LTE (VoLTE) or voice function. Incorrect voice settings. | Confirm with your SIM card carrier if voice calling is supported on their network with this type of device. Check voice settings in the web rozhraní (Device Settings > Voice Settings). Note: Verizon SIM cards may not support this feature. |
| Nelze přistupovat Web Rozhraní | Incorrect IP address. Network connectivity issue. | Ensure your device is connected to the router (wired or Wi-Fi). Verify you are using the correct IP address (default is 192.168.0.1). Try restarting the router. |
If problems persist, please contact Yeacomm professional tech support for assistance before considering a return.
8. Specifikace
| Funkce | Detail |
|---|---|
| Rozměry produktu | 9.06 x 5.12 x 0.79 palce |
| Hmotnost položky | 1.54 libry |
| Číslo modelu | YF-P21-Black |
| Značka | Ano |
| Speciální funkce | 2*RJ-11 port/4*RJ45 port, 2*SMA external antenna port |
| Třída frekvenčního pásma | Quad-Band (FDD: B2/B3/B4/B5/B7/B8/B28, TDD: 38/39/40/41, 3G HSPA+: 850Mhz/900Mhz/1900Mhz) |
| Standard bezdrátové komunikace | 802.11b, 802.11g, 802.11n |
| Kompatibilní zařízení | Osobní počítač |
| Frekvence | 2.4 GHz |
| Doporučená použití | Domácí kancelář |

Figure 7: US Carrier LTE Frequency Bands and Yeacomm P21 Router Support Bands.
9. Záruka a podpora
For any issues or questions regarding your Yeacomm 4G LTE CPE Router, please contact Yeacomm's professional technical support. Their contact information can typically be found on the included After-sales Card or on the official Yeacomm webmísto.
Before returning the product, it is highly recommended to contact technical support first, as many issues can be resolved with their guidance.
10. Oficiální produktová videa
No official product videos from the seller are available for embedding at this time. Please refer to the text and image instructions provided in this manual for guidance.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.