Mobile Modem

Configure and monitor the 5G-NR modem's connections and linking parameters.

Review Installations

To ensure a seamless mobile internet connection, please review the below steps. If any steps have been misconfigured, click the hyperlink to return to their guides.

• SIM Card – An activated and functional SIM card is inserted into the primary SIM1 slot.

• 5G Antennas – 5G-NR antennas are installed into the 1/2/3 sockets on the top side.

• Signal Quality – The location should have a fair mobile signal reception.

• PoE Injector – The PoE injector is connected to the PoE&LAN port and a workable electric outlet.

The default mobile modem settings can adapt to most operators; MIMO, carrier aggregation, and LTE fallback will be activated automatically. After powering on, wait 3 to 5 minutes until the router is fully booted up and automatically dials for the mobile connection.

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Connection Status

After establishing a connection to a cell tower, the "SIM Card" status and "Mobile Connection" status show "Connected" on the "Device" section of the front dashboard, along with operator ID, access technology, and signal quality. The mobile interface displays the mobile IP address, real-time RX TX stream, and mobile connection uptime.

i. Modem Device

After connecting and logging into the router, you can find the mobile modem device information at the homepage's upper right corner and keep refreshing the connection status.

Click the "Reacquire" button to manually refresh and obtain the updated information.

EZR35 Router 5G Modem Status And Mobile IP Upstream

Mobile Modem

• Mobile Modem: The 5G modem's model number.

• IMEI Number: It's a unique serial number of the mobile modem.

SIM Card

• SIM Card is the current SIM slot the router is using.

• SIM Status shows the working status of the active SIM card.

• Phone Number is the active SIM card's number. Some of the data plans do not have.

Connection

• Mobile Operator is the provider of wireless mobile services.

• Mobile Connection displays the status of the mobile internet connection.

• Roaming occurs when connected to a mobile network other than the SIM card's home network.

• Global Cell ID (GCID) identifies the cellular tower currently connected to.

• Operator ID, also known as MCCMNC, helps to recognize which carriers are connected.

• Access Tech refers to the type of mobile network technology the router uses to connect to the internet, including 3G (UMTS or WCDMA), 4G (LTE), 5G NR, or a combination.

Signals

The signal value fields show various background colors based on their value and related signal strength. Green indicates good, yellow represents fair, and red signifies weak signal.

• RSRQ: Indicates the quality of the received signal.

• RSRP: The average power received from a single reference signal.

• SNR: The signal-to-noise ratio of the given signal.

EZR35 Router 5G Mobile Interface wwan0 Status

ii. Mobile Interface

Go to "Network > Interface" to go to the interface overview page. Locate the Mobile (wwan0) on the second row. It shows the information below.

• Protocol is the current mobile protocol.

• Uptime is the total working time of the currently active mobile internet connection.

• RX is the download traffic, and TX is the upload traffic.

• SIM shows the current activated SIM card slot.

• IPv4 is the mobile internet IP address, usually a private IP address.

You can manually click the "Stop" or "Restart" button on the Mobile interface to kill the mobile connection or redial for a new link.

Do not click the "Delete" button on the Mobile interface. It will "erase" the mobile modem until reset the router.

iii. Troubleshooting

Below are the common issues that may occur during daily use and their related solutions. Please refer to the modem diagnosis for detailed instructions on running modem diagnostics and troubleshooting.

No SIM Card Detected

Appearance: If the SIM status shows "No SIM" and the modem cannot connect, the SIM card might be inserted incorrectly or blocked by the mobile carrier.

Solution: First, test the SIM card on a smartphone to ensure it is functional. If it's a brand-new SIM card, follow the mobile carrier's instructions to activate it.

Then, follow the SIM card operating instructions to reinsert the SIM card. Remember to check the golden contacts on the SIM card and clean any dirt before reinserting.

Failed To Connect

Appearance: If the SIM card is detected but the modem status shows "Not Connected," the signal may be too weak, or the SIM card may have run out of data allowance.

Solution: First, check the signal quality and ensure the RSRP value is above -105dBm. Then check your SIM card account and ensure it has enough data allowance.

After that, verify the mobile APN settings. If you are still unsuccessful, refer to the mobile protocol guidance to switch to the traditional protocol. Some low-priority data plans may be restricted from connecting through the advanced protocol.

Connected But No Internet

Appearance: This issue led to being unable to access the internet, indicating that the SIM status is connected. The mobile interface has obtained an IPv4/6 address, and the Mobile status displays signal quality.

Solution: First, verify if the mobile modem has internet by ping a public IP or website under "Network > Diagnostics."

⭔ If the ping test has succeeded, the firewall zone might be misconfigured, and suggest resetting the router.

⭔ If the ping test has failed, take out the SIM card and test it on a smartphone to ensure it is functional. If it's a brand-new SIM card, follow the mobile carrier's instructions to activate it.

Then, check that it has enough data allowance. After that, verify the APN address with the carrier and modify it as the guide below shows. Finally, recheck the RSRP value for signal quality and ensure it's above -105dBm.

Connected But Unstable

Appearance: If the modem status is connected but suffering from slow internet speed or intermittently interrupted connections, these issues are usually caused by busy hours, unstable mobile signals, and frequent remote access requests.

Solution: When too many terminals connect to the same cell tower during busy hours, the average mobile speed slows down and may be interrupted. Consider improving the signal quality by changing locations or upgrading the SIM card's data to a business grade, which typically offers an uninterrupted priority connection from mobile carriers.

To maintain a fast and stable mobile connection, the recommended RSRP value should be above -100 dBm. To enhance mobile signals, consider adjusting the location or upgrading the antennas.

If the mobile connection obtains a public IP address, it may receive frequent remote access requests that could disrupt local networks. Go to "Status > System Log" to download the router's system log and send it to our support team for an optimization plan.

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APN & SIM Slot

APN, short for Access Point Name, is the gateway to access the mobile network. In general conditions, the router can use the default APN parameters prebuilt in the mobile modem to set up a connection.

Some mobile carriers use different APN parameters for the various data plans. After confirming the accurate APN address with the mobile operator, you can configure the APN settings on the mobile interface, as shown below.

To modify the Mobile APN settings, connect and log in to the router, then follow the below steps.

1. Go to "Network > Interfaces > Mobile" and click the "Edit" button on the Mobile interface.

2. On the tab of General Setup. You can choose the SIM card and enable the auto switch SIM card function when the router has two workable SIM cards. Protocol: Suggest using the default protocol Mobile Data unless the provider does not support it, which usually happens in rural areas. Modem Device: Use the default "../usb2/2-1" unless switching the above "Protocol." Active SIM Card: Choose the SIM card you want to use. Auto Switch SIM Card: Enable this option to automatically switch to another SIM card when the above "Active SIM card" is offline.

3. Click the tab of related SIM cards to configure their APN and PIN settings. APN: Input the mobile carrier's APN gateway address. PIN: 4-digit code. If you have not changed it before, leave it empty. Username: Username of the APN gateway. Password: Password of the APN gateway. Authentication: Leave it as "--Please choose--" or choose PAP in most cases. IP Connection: Leave it as "--Please choose--" or choose IPv4 in most cases. Allow Roaming: Leave it selected unless you need to disable the roaming function.

EZR35-5G Router Modem Interface SIM Slot And APN Settings

Click the Save & Apply button on the bottom right corner to apply the new settings. It will jump back to the interface overview page. Wait 1-2 minutes until the mobile modem reconnects to the mobile network.

For more details on the APN settings, check the APN setting tutorial.

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Mobile Protocol

Mobile protocol refers to communication technology and networking standards it uses to connect to cellular networks and transport data.

The default Modem Manager protocol provides advanced features and fast speeds that work well in most scenarios. However, some limited data plans or rural areas may still rely on traditional protocols.

Click on the Mobile Protocol tutorial to learn more about QMI and PPP protocols and how to switch them. Their APN, PIN, and authentication settings are similar. Please pay attention to setting the correct modem devices for different protocols.

Mobile Data ––– /sys/.../usb2/2-1 QMI ––– /dev/cdc-wdm0 PPP ––– /dev/ttyUSB2

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Mobile Watchdog

The 5G router has integrated a dedicated monitoring program to keep mobile internet alive. It continuously and periodically checks the internet connection through ping tests. If the connection test fails, it automatically triggers a modem reset and reconnection process.

Go to "Services > Mobile Watchdog" to check its settings. Refer to the Mobile Watchdog tutorial to explore more introductions and advanced configurations.