> For the complete documentation index, see [llms.txt](https://outdoor.router.works/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://outdoor.router.works/ezr33/diagnostics/test-signal-strength.md).

# Test Signal Strength

## Signal Quality <a href="#signal-quality" id="signal-quality"></a>

The numerical values of 2G and 3G networks are RSSI standards. The LTE network is the RSRP standard, the Reference Signal receiving power. The closer the number is to zero, the better the reception, so -90dB is a stronger signal than -100 dB. ‌&#x20;

The signal sensitivity of the 4G mobile modem is -101dBm. To acquire a fast and stable 4G internet connection, the router should receive > -101dBm RSRP LTE signals.

<figure><img src="https://1340417500-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LvFoPQjE_9d9UfSmbIn%2F-Lwqbio28i1Ng6jyz6fI%2F-LwqeNgnWAcApRwWCqPs%2FOutdoorRouter_4G-Signal-Quality.png?alt=media&#x26;token=f56cd398-5016-4935-956c-29440f7c212a" alt=""><figcaption><p>3G RSSI &#x26; 4G RSRP - Signal Quality</p></figcaption></figure>

## General Signal Info <a href="#general-signal-info" id="general-signal-info"></a>

After accessing the router, go to the `front page` or `Status` > `Overview`. You can find the accurate signal strength information in the `Device` information section. Refer to the [signal test on router](/ezr33/installation/signal-tests.md). Click the `Reacquire` button to get the updated signal strength information.

{% hint style="info" %}
Since setting up the cellular connection is the priority, the Device information will take a few minutes to show completely on the first boot.
{% endhint %}

## Instant Signal Info <a href="#instant-signal-info" id="instant-signal-info"></a>

When using a directional mobile antenna, you can check the instant signal information to locate the antenna with the best signal reception. The EZR33 router has built-in UQMI and QMICLI commands, which are workable with the [`QMI-Cellular`](/ezr33/configuration/mobile-modem.md#qmi-cellular-protocol) protocol only.&#x20;

After inserting a SIM card and the router is powered on, go to the [command-line](/ezr33/advanced/command-line.md) interface and use the below commands to check the instant signal information. Refer to [`Device information`](/ezr33/configuration/router-status.md#device-information) to get the meaning of parameters.

### i. UQMI

Command `uqmi -d /dev/cdc-wdm0 --get-signal-info`

```
root@OutdoorRouter:~# uqmi -d /dev/cdc-wdm0 --get-signal-info
{
        ""type"": ""lte"",
        ""rssi"": -60,
        ""rsrq"": -14,
        ""rsrp"": -88,
        ""snr"": 122
}
```

### ii. QMICLI

Command `qmicli -d /dev/cdc-wdm0 --nas-get-signal-info`

```
root@OutdoorRouter:~# qmicli -d /dev/cdc-wdm0 --nas-get-signal-info
[Date] -Warning ** [/dev/cdc-wdm0] 
[/dev/cdc-wdm0] Successfully got signal info
LTE:
        RSSI: '-55 dBm'
        RSRQ: '-11 dB'
        RSRP: '-89 dBm'
        SNR: '7.8 dB'
```

Command `qmicli -d /dev/cdc-wdm0 --nas-get-signal-strength`

```
root@OutdoorRouter:~# qmicli -d /dev/cdc-wdm0 --nas-get-signal-strength
[Date] -Warning ** [/dev/cdc-wdm0] 
[/dev/cdc-wdm0] Successfully got signal strength
Current:
        Network 'lte': '-55 dBm'
RSSI:
        Network 'lte': '-55 dBm'
ECIO:
        Network 'lte': '-2.5 dBm'
IO: '-106 dBm'
SINR (8): '9.0 dB'
RSRQ:
        Network 'lte': '-11 dB'
SNR:
        Network 'lte': '11.4 dB'
RSRP:
        Network 'lte': '-89 dBm'
```